How to change screen resolution in WPF?

How to change screen resolution in WPF? - c#

how can I change screen resolution programmatically in WPF?
And how can I get a list of available resolutions for display?
I tried have a go at the example described in this article: http://www.c-sharpcorner.com/UploadFile/Joshy_geo/changescreenresolution10102006112110AM/changescreenresolution.aspx But Screen and Resolution classes do not exist in the System.Diagnostics namespace.
C#/WPF
Thanx.

Sorry for the trouble. I found the solution for Windows Forms and made minor changes.
WPF Solution
Place two Listbox (listDevices and listSettings) and Button (btnSave) on the window.
using System;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Controls;
public partial class MainWindow : Window
{
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAY_DEVICE
{
public int cb;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string DeviceName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceString;
public int StateFlags;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceID;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string DeviceKey;
public DISPLAY_DEVICE(int flags)
{
cb = 0;
StateFlags = flags;
DeviceName = new string((char)32, 32);
DeviceString = new string((char)32, 128);
DeviceID = new string((char)32, 128);
DeviceKey = new string((char)32, 128);
cb = Marshal.SizeOf(this);
}
}
[StructLayout(LayoutKind.Sequential)]
public struct DEVMODE
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string dmDeviceName;
public short dmSpecVersion;
public short dmDriverVersion;
public short dmSize;
public short dmDriverExtra;
public int dmFields;
public short dmOrientation;
public short dmPaperSize;
public short dmPaperLength;
public short dmPaperWidth;
public short dmScale;
public short dmCopies;
public short dmDefaultSource;
public short dmPrintQuality;
public short dmColor;
public short dmDuplex;
public short dmYResolution;
public short dmTTOption;
public short dmCollate;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string dmFormName;
public short dmUnusedPadding;
public short dmBitsPerPel;
public int dmPelsWidth;
public int dmPelsHeight;
public int dmDisplayFlags;
public int dmDisplayFrequency;
}
public MainWindow()
{
InitializeComponent();
EnumDevices();
}
private void listDevices_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
int devNum = listDevices.SelectedIndex;
bool isMain = MainDevice(devNum);
btnSet.IsEnabled = isMain; // enable only for the main device
EnumModes(devNum);
}
private void btnSet_Click(object sender, RoutedEventArgs e)
{ //set selected display mode
int devNum = listDevices.SelectedIndex;
int modeNum = listSettings.SelectedIndex;
DEVMODE d = GetDevmode(devNum, modeNum);
if (d.dmBitsPerPel != 0 & d.dmPelsWidth != 0
& d.dmPelsHeight != 0)
{
ChangeDisplaySettings(ref d, 0);
}
}
private void EnumModes(int devNum)
{
listSettings.Items.Clear();
string devName = GetDeviceName(devNum);
DEVMODE devMode = new DEVMODE();
int modeNum = 0;
bool result = true;
do
{
result = EnumDisplaySettings(devName,
modeNum, ref devMode);
if (result)
{
string item = DevmodeToString(devMode);
listSettings.Items.Add(item);
}
modeNum++;
} while (result);
if (listSettings.Items.Count > 0)
{
DEVMODE current = GetDevmode(devNum, -1);
// int selected = listSettings.FindString(DevmodeToString(current));
int selected = listSettings.Items.IndexOf(DevmodeToString(current));
if (selected >= 0)
{
listSettings.SelectedIndex = selected;
// listSettings.SetSelected(selected, true);
}
}
}
private DEVMODE GetDevmode(int devNum, int modeNum)
{ //populates DEVMODE for the specified device and mode
DEVMODE devMode = new DEVMODE();
string devName = GetDeviceName(devNum);
EnumDisplaySettings(devName, modeNum, ref devMode);
return devMode;
}
private string DevmodeToString(DEVMODE devMode)
{
return devMode.dmPelsWidth.ToString() +
" x " + devMode.dmPelsHeight.ToString() +
", " + devMode.dmBitsPerPel.ToString() +
" bits, " +
devMode.dmDisplayFrequency.ToString() + " Hz";
}
private void EnumDevices()
{ //populates Display Devices list
this.listDevices.Items.Clear();
DISPLAY_DEVICE d = new DISPLAY_DEVICE(0);
int devNum = 0;
bool result;
do
{
result = EnumDisplayDevices(IntPtr.Zero,
devNum, ref d, 0);
if (result)
{
string item = devNum.ToString() +
". " + d.DeviceString.Trim();
if ((d.StateFlags & 4) != 0) item += " - main";
this.listDevices.Items.Add(item);
}
devNum++;
} while (result);
}
private string GetDeviceName(int devNum)
{
DISPLAY_DEVICE d = new DISPLAY_DEVICE(0);
bool result = EnumDisplayDevices(IntPtr.Zero,
devNum, ref d, 0);
return (result ? d.DeviceName.Trim() : "#error#");
}
private bool MainDevice(int devNum)
{ //whether the specified device is the main device
DISPLAY_DEVICE d = new DISPLAY_DEVICE(0);
if (EnumDisplayDevices(IntPtr.Zero, devNum, ref d, 0))
{
return ((d.StateFlags & 4) != 0);
} return false;
}
[DllImport("User32.dll")]
private static extern bool EnumDisplayDevices(
IntPtr lpDevice, int iDevNum,
ref DISPLAY_DEVICE lpDisplayDevice, int dwFlags);
[DllImport("User32.dll")]
private static extern bool EnumDisplaySettings(
string devName, int modeNum, ref DEVMODE devMode);
[DllImport("user32.dll")]
public static extern int ChangeDisplaySettings(
ref DEVMODE devMode, int flags);
}
WPF Screen Resolution Source: http://www.mediafire.com/?ciiymhmc7v28v4y

Related

C# how to use NM_CUSTOMDRAW to native trackBar control

I use the code below to modify native trackbar.
My questions are:
How to detect if mouse is over thumb and change its color?
How to change the shape of thumb? (How to keep the original shape?)
public class TrackBarCustom : TrackBar
{
private Color tbarColor;
private Color tbarBorder;
private Color thumbColor;
private Color thumbBorder;
public TrackBarCustom()
{
}
// custom draw item specs
private const int TBCD_TICS = 0x1;
private const int TBCD_THUMB = 0x2;
private const int TBCD_CHANNEL = 0x3;
[StructLayout(LayoutKind.Sequential)]
public struct NMHDR
{
public IntPtr hwndFrom;
public IntPtr idFrom;
public int code;
}
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int left;
public int top;
public int right;
public int bottom;
}
[StructLayout(LayoutKind.Sequential)]
public struct NMCUSTOMDRAW
{
public NMHDR hdr;
public int dwDrawStage;
public IntPtr hdc;
public RECT rc;
public IntPtr dwItemSpec;
public uint uItemState;
public IntPtr lItemlParam;
}
[Flags]
public enum CDRF
{
CDRF_DODEFAULT = 0x0,
CDRF_NEWFONT = 0x2,
CDRF_SKIPDEFAULT = 0x4,
CDRF_DOERASE = 0x8,
CDRF_SKIPPOSTPAINT = 0x100,
CDRF_NOTIFYPOSTPAINT = 0x10,
CDRF_NOTIFYITEMDRAW = 0x20,
CDRF_NOTIFYSUBITEMDRAW = 0x20,
CDRF_NOTIFYPOSTERASE = 0x40
}
[Flags]
public enum CDDS
{
CDDS_PREPAINT = 0x1,
CDDS_POSTPAINT = 0x2,
CDDS_PREERASE = 0x3,
CDDS_POSTERASE = 0x4,
CDDS_ITEM = 0x10000,
CDDS_ITEMPREPAINT = (CDDS.CDDS_ITEM | CDDS.CDDS_PREPAINT),
CDDS_ITEMPOSTPAINT = (CDDS.CDDS_ITEM | CDDS.CDDS_POSTPAINT),
CDDS_ITEMPREERASE = (CDDS.CDDS_ITEM | CDDS.CDDS_PREERASE),
CDDS_ITEMPOSTERASE = (CDDS.CDDS_ITEM | CDDS.CDDS_POSTERASE),
CDDS_SUBITEM = 0x20000
}
[DllImport("User32.dll", SetLastError = true)]
public static extern int FillRect(IntPtr hDC, ref RECT lpRect, IntPtr hBR);
[DllImport("User32.dll", SetLastError = true)]
public static extern int FrameRect(IntPtr hDC, ref RECT lpRect, IntPtr hPN);
[DllImport("gdi32")]
public static extern IntPtr CreatePen(int penStyle, int width, int color);
[DllImport("Gdi32.dll", SetLastError = true)]
public static extern IntPtr CreateSolidBrush(int crColor);
[DllImport("Gdi32.dll", SetLastError = true)]
public static extern bool DeleteObject(IntPtr hObject);
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_REFLECT + WM_NOFITY)
{
var pnmhdr = (NMHDR)m.GetLParam(typeof(NMHDR));
if (pnmhdr.code == NM_CUSTOMDRAW)
{
var pnmlv = (NMCUSTOMDRAW)m.GetLParam(typeof(NMCUSTOMDRAW));
switch (pnmlv.dwDrawStage)
{
case (int)CDDS.CDDS_PREPAINT:
{
m.Result = new IntPtr((int)CDRF.CDRF_NOTIFYITEMDRAW);
break;
}
case (int)CDDS.CDDS_ITEMPREPAINT:
{
if (((int)pnmlv.dwItemSpec == TBCD_THUMB))
{
IntPtr hBrush = CreateSolidBrush(ColorTranslator.ToWin32(Enabled ? ThumbColor : Color.Silver));
IntPtr hPen = CreatePen(0, 1, ColorTranslator.ToWin32(Enabled ? ThumbBorder : Color.DarkGray));
FillRect(pnmlv.hdc, ref pnmlv.rc, hBrush);
FrameRect(pnmlv.hdc, ref pnmlv.rc, hPen);
DeleteObject(hBrush);
DeleteObject(hPen);
m.Result = new IntPtr((int)CDRF.CDRF_SKIPDEFAULT);
}
else if (((int)pnmlv.dwItemSpec == TBCD_CHANNEL))
{
IntPtr hBarBrush = CreateSolidBrush(ColorTranslator.ToWin32(Enabled ? TbarColor : Color.Silver));
IntPtr hBarPen = CreatePen(0, 1, ColorTranslator.ToWin32(Enabled ? TbarBorder : Color.DarkGray));
FillRect(pnmlv.hdc, ref pnmlv.rc, hBarBrush);
FrameRect(pnmlv.hdc, ref pnmlv.rc, hBarPen);
DeleteObject(hBarBrush);
DeleteObject(hBarPen);
m.Result = new IntPtr((int)CDRF.CDRF_SKIPDEFAULT);
}
else
m.Result = new IntPtr((int)CDRF.CDRF_NOTIFYPOSTPAINT);
break;
}
case (int)CDDS.CDDS_ITEMPOSTPAINT:
{
m.Result = new IntPtr((int)CDRF.CDRF_DODEFAULT);
break;
}
}
}
return;
}
else
base.WndProc(ref m);
}
private const int NM_FIRST = 0;
private const int NM_CLICK = NM_FIRST - 2;
private const int NM_CUSTOMDRAW = NM_FIRST - 12;
private const int WM_REFLECT = 0x2000;
private const int WM_NOFITY = 0x4E;
public Color ThumbColor
{
get
{
return thumbColor;
}
set
{
thumbColor = value;
Update();
Refresh();
Invalidate();
}
}
public Color ThumbBorder
{
get
{
return thumbBorder;
}
set
{
thumbBorder = value;
Update();
Refresh();
Invalidate();
}
}
public Color TbarColor
{
get
{
return tbarColor;
}
set
{
tbarColor = value;
Update();
Refresh();
Invalidate();
}
}
public Color TbarBorder
{
get
{
return tbarBorder;
}
set
{
tbarBorder = value;
Update();
Refresh();
Invalidate();
}
}
}

Windows API to get whether HDR(High Dynamic Range) is active

My environment is Windows 10 20H2(64bit) and Visual Studio 2019.
I am developing an app as C# WPF(.NET 5) project. And I want to write a code that HDR(High Dynamic Range) is active currently on the system.
In this document, I got some hints about Windows HDR. But I could only find articles about for UWP and DirectX.
I would ideally like to use the .NET API or Win32 API. Does Windows 10 provide those APIs?

You can use the Connecting and Configuring Displays (CCD) API.
specifically the DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO request (which is not really documented in MSDN but is defined in wingdi.h)
Here is some C# Console Application sample code that dumps for each monitor if it supports HDR and if it's enabled.
static void Main()
{
var err = GetDisplayConfigBufferSizes(QDC.QDC_ONLY_ACTIVE_PATHS, out var pathCount, out var modeCount);
if (err != 0)
throw new Win32Exception(err);
var paths = new DISPLAYCONFIG_PATH_INFO[pathCount];
var modes = new DISPLAYCONFIG_MODE_INFO[modeCount];
err = QueryDisplayConfig(QDC.QDC_ONLY_ACTIVE_PATHS, ref pathCount, paths, ref modeCount, modes, IntPtr.Zero);
if (err != 0)
throw new Win32Exception(err);
foreach (var path in paths)
{
// get display name
var info = new DISPLAYCONFIG_TARGET_DEVICE_NAME();
info.header.type = DISPLAYCONFIG_DEVICE_INFO_TYPE.DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME;
info.header.size = Marshal.SizeOf<DISPLAYCONFIG_TARGET_DEVICE_NAME>();
info.header.adapterId = path.targetInfo.adapterId;
info.header.id = path.targetInfo.id;
err = DisplayConfigGetDeviceInfo(ref info);
if (err != 0)
throw new Win32Exception(err);
var colorInfo = new DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO();
colorInfo.header.type = DISPLAYCONFIG_DEVICE_INFO_TYPE.DISPLAYCONFIG_DEVICE_INFO_GET_ADVANCED_COLOR_INFO;
colorInfo.header.size = Marshal.SizeOf<DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO>();
colorInfo.header.adapterId = path.targetInfo.adapterId;
colorInfo.header.id = path.targetInfo.id;
err = DisplayConfigGetDeviceInfo(ref colorInfo);
if (err != 0)
throw new Win32Exception(err);
Console.WriteLine(info.monitorFriendlyDeviceName);
Console.WriteLine(" Advanced Color Supported: " + colorInfo.advancedColorSupported);
Console.WriteLine(" Advanced Color Enabled : " + colorInfo.advancedColorEnabled);
Console.WriteLine();
}
}
private enum DISPLAYCONFIG_DEVICE_INFO_TYPE
{
DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME = 1,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME = 2,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE = 3,
DISPLAYCONFIG_DEVICE_INFO_GET_ADAPTER_NAME = 4,
DISPLAYCONFIG_DEVICE_INFO_SET_TARGET_PERSISTENCE = 5,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_BASE_TYPE = 6,
DISPLAYCONFIG_DEVICE_INFO_GET_SUPPORT_VIRTUAL_RESOLUTION = 7,
DISPLAYCONFIG_DEVICE_INFO_SET_SUPPORT_VIRTUAL_RESOLUTION = 8,
DISPLAYCONFIG_DEVICE_INFO_GET_ADVANCED_COLOR_INFO = 9,
DISPLAYCONFIG_DEVICE_INFO_SET_ADVANCED_COLOR_STATE = 10,
DISPLAYCONFIG_DEVICE_INFO_GET_SDR_WHITE_LEVEL = 11,
}
private enum DISPLAYCONFIG_COLOR_ENCODING
{
DISPLAYCONFIG_COLOR_ENCODING_RGB = 0,
DISPLAYCONFIG_COLOR_ENCODING_YCBCR444 = 1,
DISPLAYCONFIG_COLOR_ENCODING_YCBCR422 = 2,
DISPLAYCONFIG_COLOR_ENCODING_YCBCR420 = 3,
DISPLAYCONFIG_COLOR_ENCODING_INTENSITY = 4,
}
private enum DISPLAYCONFIG_SCALING
{
DISPLAYCONFIG_SCALING_IDENTITY = 1,
DISPLAYCONFIG_SCALING_CENTERED = 2,
DISPLAYCONFIG_SCALING_STRETCHED = 3,
DISPLAYCONFIG_SCALING_ASPECTRATIOCENTEREDMAX = 4,
DISPLAYCONFIG_SCALING_CUSTOM = 5,
DISPLAYCONFIG_SCALING_PREFERRED = 128,
}
private enum DISPLAYCONFIG_ROTATION
{
DISPLAYCONFIG_ROTATION_IDENTITY = 1,
DISPLAYCONFIG_ROTATION_ROTATE90 = 2,
DISPLAYCONFIG_ROTATION_ROTATE180 = 3,
}
private enum DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY
{
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_OTHER = -1,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HD15 = 0,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SVIDEO = 1,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPOSITE_VIDEO = 2,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPONENT_VIDEO = 3,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DVI = 4,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HDMI = 5,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_LVDS = 6,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_D_JPN = 8,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDI = 9,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EXTERNAL = 10,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED = 11,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EXTERNAL = 12,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED = 13,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDTVDONGLE = 14,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_MIRACAST = 15,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INDIRECT_WIRED = 16,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INDIRECT_VIRTUAL = 17,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL = unchecked((int)0x80000000),
}
private enum DISPLAYCONFIG_TOPOLOGY_ID
{
DISPLAYCONFIG_TOPOLOGY_INTERNAL = 0x00000001,
DISPLAYCONFIG_TOPOLOGY_CLONE = 0x00000002,
DISPLAYCONFIG_TOPOLOGY_EXTEND = 0x00000004,
DISPLAYCONFIG_TOPOLOGY_EXTERNAL = 0x00000008,
}
private enum DISPLAYCONFIG_PATH
{
DISPLAYCONFIG_PATH_ACTIVE = 0x00000001,
DISPLAYCONFIG_PATH_PREFERRED_UNSCALED = 0x00000004,
DISPLAYCONFIG_PATH_SUPPORT_VIRTUAL_MODE = 0x00000008,
}
private enum DISPLAYCONFIG_SOURCE_FLAGS
{
DISPLAYCONFIG_SOURCE_IN_USE = 0x00000001,
}
private enum DISPLAYCONFIG_TARGET_FLAGS
{
DISPLAYCONFIG_TARGET_IN_USE = 0x00000001,
DISPLAYCONFIG_TARGET_FORCIBLE = 0x00000002,
DISPLAYCONFIG_TARGET_FORCED_AVAILABILITY_BOOT = 0x00000004,
DISPLAYCONFIG_TARGET_FORCED_AVAILABILITY_PATH = 0x00000008,
DISPLAYCONFIG_TARGET_FORCED_AVAILABILITY_SYSTEM = 0x00000010,
DISPLAYCONFIG_TARGET_IS_HMD = 0x00000020,
}
private enum QDC
{
QDC_ALL_PATHS = 0x00000001,
QDC_ONLY_ACTIVE_PATHS = 0x00000002,
QDC_DATABASE_CURRENT = 0x00000004,
QDC_VIRTUAL_MODE_AWARE = 0x00000010,
QDC_INCLUDE_HMD = 0x00000020,
}
private enum DISPLAYCONFIG_SCANLINE_ORDERING
{
DISPLAYCONFIG_SCANLINE_ORDERING_UNSPECIFIED = 0,
DISPLAYCONFIG_SCANLINE_ORDERING_PROGRESSIVE = 1,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED = 2,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_UPPERFIELDFIRST = DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_LOWERFIELDFIRST = 3,
}
private enum DISPLAYCONFIG_PIXELFORMAT
{
DISPLAYCONFIG_PIXELFORMAT_8BPP = 1,
DISPLAYCONFIG_PIXELFORMAT_16BPP = 2,
DISPLAYCONFIG_PIXELFORMAT_24BPP = 3,
DISPLAYCONFIG_PIXELFORMAT_32BPP = 4,
DISPLAYCONFIG_PIXELFORMAT_NONGDI = 5,
}
private enum DISPLAYCONFIG_MODE_INFO_TYPE
{
DISPLAYCONFIG_MODE_INFO_TYPE_SOURCE = 1,
DISPLAYCONFIG_MODE_INFO_TYPE_TARGET = 2,
DISPLAYCONFIG_MODE_INFO_TYPE_DESKTOP_IMAGE = 3,
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_DEVICE_INFO_HEADER
{
public DISPLAYCONFIG_DEVICE_INFO_TYPE type;
public int size;
public LUID adapterId;
public uint id;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO
{
public DISPLAYCONFIG_DEVICE_INFO_HEADER header;
public uint value;
public DISPLAYCONFIG_COLOR_ENCODING colorEncoding;
public int bitsPerColorChannel;
public bool advancedColorSupported => (value & 0x1) == 0x1;
public bool advancedColorEnabled => (value & 0x2) == 0x2;
public bool wideColorEnforced => (value & 0x4) == 0x4;
public bool advancedColorForceDisabled => (value & 0x8) == 0x8;
}
[StructLayout(LayoutKind.Sequential)]
private struct POINTL
{
public int x;
public int y;
}
[StructLayout(LayoutKind.Sequential)]
private struct LUID
{
public uint LowPart;
public int HighPart;
public long Value => ((long)HighPart << 32) | LowPart;
public override string ToString() => Value.ToString();
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_SOURCE_MODE
{
public uint width;
public uint height;
public DISPLAYCONFIG_PIXELFORMAT pixelFormat;
public POINTL position;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_RATIONAL
{
public uint Numerator;
public uint Denominator;
public override string ToString() => Numerator + " / " + Denominator;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_2DREGION
{
public uint cx;
public uint cy;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_DESKTOP_IMAGE_INFO
{
public POINTL PathSourceSize;
public RECT DesktopImageRegion;
public RECT DesktopImageClip;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_VIDEO_SIGNAL_INFO
{
public ulong pixelRate;
public DISPLAYCONFIG_RATIONAL hSyncFreq;
public DISPLAYCONFIG_RATIONAL vSyncFreq;
public DISPLAYCONFIG_2DREGION activeSize;
public DISPLAYCONFIG_2DREGION totalSize;
public uint videoStandard;
public DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_TARGET_MODE
{
public DISPLAYCONFIG_VIDEO_SIGNAL_INFO targetVideoSignalInfo;
}
[StructLayout(LayoutKind.Explicit)]
private struct DISPLAYCONFIG_MODE_INFO_union
{
[FieldOffset(0)]
public DISPLAYCONFIG_TARGET_MODE targetMode;
[FieldOffset(0)]
public DISPLAYCONFIG_SOURCE_MODE sourceMode;
[FieldOffset(0)]
public DISPLAYCONFIG_DESKTOP_IMAGE_INFO desktopImageInfo;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_PATH_SOURCE_INFO
{
public LUID adapterId;
public uint id;
public uint modeInfoIdx;
public DISPLAYCONFIG_SOURCE_FLAGS statusFlags;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_PATH_TARGET_INFO
{
public LUID adapterId;
public uint id;
public uint modeInfoIdx;
public DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY outputTechnology;
public DISPLAYCONFIG_ROTATION rotation;
public DISPLAYCONFIG_SCALING scaling;
public DISPLAYCONFIG_RATIONAL refreshRate;
public DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
public bool targetAvailable;
public DISPLAYCONFIG_TARGET_FLAGS statusFlags;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_PATH_INFO
{
public DISPLAYCONFIG_PATH_SOURCE_INFO sourceInfo;
public DISPLAYCONFIG_PATH_TARGET_INFO targetInfo;
public DISPLAYCONFIG_PATH flags;
}
[StructLayout(LayoutKind.Sequential)]
private struct DISPLAYCONFIG_MODE_INFO
{
public DISPLAYCONFIG_MODE_INFO_TYPE infoType;
public uint id;
public LUID adapterId;
public DISPLAYCONFIG_MODE_INFO_union info;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct DISPLAYCONFIG_SOURCE_DEVICE_NAME
{
public DISPLAYCONFIG_DEVICE_INFO_HEADER header;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string viewGdiDeviceName;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS
{
public uint value;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct DISPLAYCONFIG_TARGET_DEVICE_NAME
{
public DISPLAYCONFIG_DEVICE_INFO_HEADER header;
public DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS flags;
public DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY outputTechnology;
public ushort edidManufactureId;
public ushort edidProductCodeId;
public uint connectorInstance;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
public string monitorFriendlyDeviceName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string monitorDevicePat;
}
[StructLayout(LayoutKind.Sequential)]
private struct RECT
{
public int left;
public int top;
public int right;
public int bottom;
}
[DllImport("user32")]
private static extern int GetDisplayConfigBufferSizes(QDC flags, out int numPathArrayElements, out int numModeInfoArrayElements);
[DllImport("user32")]
private static extern int QueryDisplayConfig(QDC flags, ref int numPathArrayElements, [In, Out] DISPLAYCONFIG_PATH_INFO[] pathArray, ref int numModeInfoArrayElements, [In, Out] DISPLAYCONFIG_MODE_INFO[] modeInfoArray, out DISPLAYCONFIG_TOPOLOGY_ID currentTopologyId);
[DllImport("user32")]
private static extern int QueryDisplayConfig(QDC flags, ref int numPathArrayElements, [In, Out] DISPLAYCONFIG_PATH_INFO[] pathArray, ref int numModeInfoArrayElements, [In, Out] DISPLAYCONFIG_MODE_INFO[] modeInfoArray, IntPtr currentTopologyId);
[DllImport("user32")]
private static extern int DisplayConfigGetDeviceInfo(ref DISPLAYCONFIG_GET_ADVANCED_COLOR_INFO requestPacket);
[DllImport("user32")]
private static extern int DisplayConfigGetDeviceInfo(ref DISPLAYCONFIG_SOURCE_DEVICE_NAME requestPacket);
[DllImport("user32")]
private static extern int DisplayConfigGetDeviceInfo(ref DISPLAYCONFIG_TARGET_DEVICE_NAME requestPacket);

DocumentProperties not updating the print job with new DEVMODE structure

I am trying to update a print job with a new property set to the printer's DEVMODE structure in my C# win forms application. Specifically, the tray to print to.
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public class DOCINFOA
{
[MarshalAs(UnmanagedType.LPStr)]
public string lpszDocName;
[MarshalAs(UnmanagedType.LPStr)]
public string lpszOutput;
[MarshalAs(UnmanagedType.LPStr)]
public string lpszDatatype;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct PRINTER_INFO_2
{
[MarshalAs(UnmanagedType.LPStr)]
public string pServerName;
[MarshalAs(UnmanagedType.LPStr)]
public string pPrinterName;
[MarshalAs(UnmanagedType.LPStr)]
public string pShareName;
[MarshalAs(UnmanagedType.LPStr)]
public string pPortName;
[MarshalAs(UnmanagedType.LPStr)]
public string pDriverName;
[MarshalAs(UnmanagedType.LPStr)]
public string pComment;
[MarshalAs(UnmanagedType.LPStr)]
public string pLocation;
public IntPtr pDevMode;
[MarshalAs(UnmanagedType.LPStr)]
public string pSepFile;
[MarshalAs(UnmanagedType.LPStr)]
public string pPrintProcessor;
[MarshalAs(UnmanagedType.LPStr)]
public string pDatatype;
[MarshalAs(UnmanagedType.LPStr)]
public string pParameters;
public IntPtr pSecurityDescriptor;
public int Attributes;
public int Priority;
public int DefaultPriority;
public int StartTime;
public int UntilTime;
public int Status;
public int cJobs;
public int AveragePPM;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public class DEVMODE
{
private const int CCHDEVICENAME = 32;
private const int CCHFORMNAME = 32;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHDEVICENAME)]
public string dmDeviceName;
public ushort dmSpecVersion;
public ushort dmDriverVersion;
public ushort dmSize;
public ushort dmDriverExtra;
public uint dmFields;
// values to set based on dmFields bits
public short dmOrientation;
public short dmPaperSize;
public short dmPaperLength;
public short dmPaperWidth;
public short dmScale;
public short dmCopies;
public short dmDefaultSource;
public short dmPrintQuality;
public int dmPositionX;
public int dmPositionY;
public uint dmDisplayOrientation;
public uint dmDisplayFixedOutput;
public short dmColor;
public short dmDuplex;
public short dmYResolution;
public short dmTTOption;
public short dmCollate;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = CCHFORMNAME)]
public string dmFormName;
public ushort dmLogPixels;
public uint dmBitsPerPel;
public uint dmPelsWidth;
public uint dmPelsHeight;
public uint dmDisplayFlags;
public uint dmDisplayFrequency;
public uint dmICMMethod;
public uint dmICMIntent;
public uint dmMediaType;
public uint dmDitherType;
public uint dmReserved1;
public uint dmReserved2;
public uint dmPanningWidth;
public uint dmPanningHeight;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public class PRINTER_DEFAULTS
{
public IntPtr pDatatype;
public IntPtr pDevMode;
public int DesiredAccess;
}
[Flags]
public enum FModes
{
DM_SIZEOF = 0,
DM_UPDATE = 1,
DM_COPY = 2,
DM_PROMPT = 4,
DM_MODIFY = 8,
DM_OUT_DEFAULT = DM_UPDATE,
DM_OUT_BUFFER = DM_COPY,
DM_IN_PROMPT = DM_PROMPT,
DM_IN_BUFFER = DM_MODIFY,
}
[Flags]
public enum DevModeFields : uint
{
DM_ICMMETHOD = 0x10000,
DM_FORMNAME = 0x00010000,
DM_ICMINTENT = 0x04000000,
DM_MEDIATYPE = 0x08000000,
DM_DITHERTYPE = 0x10000000,
DM_COPIES = 0x00000100,
DM_DEFAULTSOURCE = 0x00000200,
DM_PRINT_QUALITY = 0x00000400,
DM_COLOR = 0x00000800,
DM_DUPLEX = 0x00001000,
DM_YRESOLUTION = 0x00002000,
DM_TTOPTION = 0x00004000,
DM_COLLATE = 0x00008000,
DM_ORIENTATION = 0x00000001,
DM_PAPERSIZE = 0x00000002,
DM_PAPERLENGTH = 0x00000004,
DM_PAPERWIDTH = 0x00000008,
DM_SCALE = 0x00000010
}
// DesiredAccess properties
const int PRINTER_ACCESS_ADMINISTER = 0x4;
const int PRINTER_ACCESS_USE = 0x8;
const int STANDARD_RIGHTS_REQUIRED = 0xF0000;
const int PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED | PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE);
public enum PaperSource
{
DMRES_HIGH = -4,
DMRES_MEDIUM = -3,
DMRES_LOW = -2,
DMRES_DRAFT = -1,
DMBIN_UPPER = 1,
DMBIN_LOWER = 2,
DMBIN_MIDDLE = 3,
DMBIN_MANUAL = 4,
DMBIN_ENVELOPE = 5,
DMBIN_ENVMANUAL = 6,
DMBIN_AUTO = 7,
DMBIN_TRACTOR = 8,
DMBIN_SMALLFMT = 9,
DMBIN_LARGEFMT = 10,
DMBIN_LARGECAPACITY = 11,
DMBIN_CASSETTE = 14,
DMBIN_FORMSOURCE = 15
}
PRINTER_DEFAULTS settings = new PRINTER_DEFAULTS
{
pDatatype = IntPtr.Zero,
pDevMode = IntPtr.Zero,
DesiredAccess = PRINTER_ACCESS_USE
};
int bytesNeeded = 0;
// get the printer handle
if (OpenPrinter(szPrinterName.Normalize(), out IntPtr hPrinter, settings))
{
// find out size needed for buffer first
GetPrinter(hPrinter, 2, IntPtr.Zero, 0, out bytesNeeded);
if (bytesNeeded > 0)
{
// allocate memory for the printer info
IntPtr pPrinterInfo = Marshal.AllocHGlobal(bytesNeeded);
// fetch pointer to printer info at level 2 (gives us DEVMODE data)
if (GetPrinter(hPrinter, 2, pPrinterInfo, bytesNeeded, out _))
{
// convert the pointer to the readable data
PRINTER_INFO_2 printerInfo = (PRINTER_INFO_2)Marshal.PtrToStructure(pPrinterInfo, typeof(PRINTER_INFO_2));
// for some reason it didnt fetch the DEVMODE data we need, try getting it elsewhere
if (true)
{
// find out size needed for buffer first
bytesNeeded = DocumentProperties(IntPtr.Zero, hPrinter, printerInfo.pPrinterName, IntPtr.Zero, IntPtr.Zero, (int)FModes.DM_SIZEOF);
if (bytesNeeded > 0)
{
// allocate memory for the DEVMODE info
IntPtr pDevMode = Marshal.AllocHGlobal(bytesNeeded);
// fetch pointer to DEVMODE info
int result = DocumentProperties(IntPtr.Zero, hPrinter, szPrinterName.Normalize(), pDevMode, IntPtr.Zero, (int)FModes.DM_OUT_BUFFER);
if (result > 0)
{
printerInfo.pDevMode = pDevMode;
}
}
}
// create the print job
DOCINFOA di = new DOCINFOA
{
lpszDocName = "My C#.NET RAW Document",
lpszDatatype = "RAW"
};
if (StartDocPrinter(hPrinter, 1, di))
{
if (StartPagePrinter(hPrinter))
{
// convert the pointer to readable data
DEVMODE dm = (DEVMODE)Marshal.PtrToStructure(printerInfo.pDevMode, typeof(DEVMODE));
// set new properties for printer
dm.dmFields |= (uint)DevModeFields.DM_DEFAULTSOURCE;
dm.dmDefaultSource = (short)PaperSource.DMBIN_UPPER;
Marshal.StructureToPtr(dm, printerInfo.pDevMode, false);
//overwrite the printers settings
int res = DocumentProperties(IntPtr.Zero, hPrinter, szPrinterName.Normalize(), printerInfo.pDevMode, printerInfo.pDevMode, (int)FModes.DM_IN_BUFFER | (int)FModes.DM_OUT_BUFFER);
if (res > 0)
{
WritePrinter(hPrinter, pBytes, dwCount, out _);
EndPagePrinter(hPrinter);
}
EndDocPrinter(hPrinter);
}
ClosePrinter(hPrinter);
}
}
}
The issue I am having is that the final call to DocumentProperties does not update the printer job settings. I've checked the structure is valid by inserting an IsDevmodeValid call each time I read or write to the structure and it returns ok. I've tried setting the DEVMODE structure both before and after the job is setup. It just does not update the settings when I view the print jobs properties.
Can anyone tell me what I'm missing here? FYI, it prints any documents fine, but to the printer's default tray.

How to find a WACOM tablet screen?

I trying to fill Wacom tablet screen with my application. How can I find this screen working area?
At this moment I just trying to find this screen by Device Friendly name using ScreenInterrogatory class (code below), but it requires me to know device name. I looking for a way to do this for any Wacom device without knowing the device name (using Wintab api).
//
public Screen GetWacomWorkingArea(string wacomDeviceName)
{
foreach(var screen in System.Windows.Forms.Screen.AllScreens)
{
if(screen.DeviceFriendlyName == wacomDeviceName)
{
return screen.WorkingArea;
}
}
}
//
public static class ScreenInterrogatory
{
public const int ERROR_SUCCESS = 0;
#region enums
public enum QUERY_DEVICE_CONFIG_FLAGS : uint
{
QDC_ALL_PATHS = 0x00000001,
QDC_ONLY_ACTIVE_PATHS = 0x00000002,
QDC_DATABASE_CURRENT = 0x00000004
}
public enum DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY : uint
{
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_OTHER = 0xFFFFFFFF,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HD15 = 0,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SVIDEO = 1,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPOSITE_VIDEO = 2,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_COMPONENT_VIDEO = 3,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DVI = 4,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_HDMI = 5,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_LVDS = 6,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_D_JPN = 8,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDI = 9,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EXTERNAL = 10,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_DISPLAYPORT_EMBEDDED = 11,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EXTERNAL = 12,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_UDI_EMBEDDED = 13,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_SDTVDONGLE = 14,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_MIRACAST = 15,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_INTERNAL = 0x80000000,
DISPLAYCONFIG_OUTPUT_TECHNOLOGY_FORCE_UINT32 = 0xFFFFFFFF
}
public enum DISPLAYCONFIG_SCANLINE_ORDERING : uint
{
DISPLAYCONFIG_SCANLINE_ORDERING_UNSPECIFIED = 0,
DISPLAYCONFIG_SCANLINE_ORDERING_PROGRESSIVE = 1,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED = 2,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_UPPERFIELDFIRST = DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED,
DISPLAYCONFIG_SCANLINE_ORDERING_INTERLACED_LOWERFIELDFIRST = 3,
DISPLAYCONFIG_SCANLINE_ORDERING_FORCE_UINT32 = 0xFFFFFFFF
}
public enum DISPLAYCONFIG_ROTATION : uint
{
DISPLAYCONFIG_ROTATION_IDENTITY = 1,
DISPLAYCONFIG_ROTATION_ROTATE90 = 2,
DISPLAYCONFIG_ROTATION_ROTATE180 = 3,
DISPLAYCONFIG_ROTATION_ROTATE270 = 4,
DISPLAYCONFIG_ROTATION_FORCE_UINT32 = 0xFFFFFFFF
}
public enum DISPLAYCONFIG_SCALING : uint
{
DISPLAYCONFIG_SCALING_IDENTITY = 1,
DISPLAYCONFIG_SCALING_CENTERED = 2,
DISPLAYCONFIG_SCALING_STRETCHED = 3,
DISPLAYCONFIG_SCALING_ASPECTRATIOCENTEREDMAX = 4,
DISPLAYCONFIG_SCALING_CUSTOM = 5,
DISPLAYCONFIG_SCALING_PREFERRED = 128,
DISPLAYCONFIG_SCALING_FORCE_UINT32 = 0xFFFFFFFF
}
public enum DISPLAYCONFIG_PIXELFORMAT : uint
{
DISPLAYCONFIG_PIXELFORMAT_8BPP = 1,
DISPLAYCONFIG_PIXELFORMAT_16BPP = 2,
DISPLAYCONFIG_PIXELFORMAT_24BPP = 3,
DISPLAYCONFIG_PIXELFORMAT_32BPP = 4,
DISPLAYCONFIG_PIXELFORMAT_NONGDI = 5,
DISPLAYCONFIG_PIXELFORMAT_FORCE_UINT32 = 0xffffffff
}
public enum DISPLAYCONFIG_MODE_INFO_TYPE : uint
{
DISPLAYCONFIG_MODE_INFO_TYPE_SOURCE = 1,
DISPLAYCONFIG_MODE_INFO_TYPE_TARGET = 2,
DISPLAYCONFIG_MODE_INFO_TYPE_FORCE_UINT32 = 0xFFFFFFFF
}
public enum DISPLAYCONFIG_DEVICE_INFO_TYPE : uint
{
DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_NAME = 1,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME = 2,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_PREFERRED_MODE = 3,
DISPLAYCONFIG_DEVICE_INFO_GET_ADAPTER_NAME = 4,
DISPLAYCONFIG_DEVICE_INFO_SET_TARGET_PERSISTENCE = 5,
DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_BASE_TYPE = 6,
DISPLAYCONFIG_DEVICE_INFO_FORCE_UINT32 = 0xFFFFFFFF
}
#endregion
#region structs
[StructLayout(LayoutKind.Sequential)]
public struct LUID
{
public uint LowPart;
public int HighPart;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_PATH_SOURCE_INFO
{
public LUID adapterId;
public uint id;
public uint modeInfoIdx;
public uint statusFlags;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_PATH_TARGET_INFO
{
public LUID adapterId;
public uint id;
public uint modeInfoIdx;
private DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY outputTechnology;
private DISPLAYCONFIG_ROTATION rotation;
private DISPLAYCONFIG_SCALING scaling;
private DISPLAYCONFIG_RATIONAL refreshRate;
private DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
public bool targetAvailable;
public uint statusFlags;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_RATIONAL
{
public uint Numerator;
public uint Denominator;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_PATH_INFO
{
public DISPLAYCONFIG_PATH_SOURCE_INFO sourceInfo;
public DISPLAYCONFIG_PATH_TARGET_INFO targetInfo;
public uint flags;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_2DREGION
{
public uint cx;
public uint cy;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_VIDEO_SIGNAL_INFO
{
public ulong pixelRate;
public DISPLAYCONFIG_RATIONAL hSyncFreq;
public DISPLAYCONFIG_RATIONAL vSyncFreq;
public DISPLAYCONFIG_2DREGION activeSize;
public DISPLAYCONFIG_2DREGION totalSize;
public uint videoStandard;
public DISPLAYCONFIG_SCANLINE_ORDERING scanLineOrdering;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_TARGET_MODE
{
public DISPLAYCONFIG_VIDEO_SIGNAL_INFO targetVideoSignalInfo;
}
[StructLayout(LayoutKind.Sequential)]
public struct POINTL
{
private int x;
private int y;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_SOURCE_MODE
{
public uint width;
public uint height;
public DISPLAYCONFIG_PIXELFORMAT pixelFormat;
public POINTL position;
}
[StructLayout(LayoutKind.Explicit)]
public struct DISPLAYCONFIG_MODE_INFO_UNION
{
[FieldOffset(0)]
public DISPLAYCONFIG_TARGET_MODE targetMode;
[FieldOffset(0)]
public DISPLAYCONFIG_SOURCE_MODE sourceMode;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_MODE_INFO
{
public DISPLAYCONFIG_MODE_INFO_TYPE infoType;
public uint id;
public LUID adapterId;
public DISPLAYCONFIG_MODE_INFO_UNION modeInfo;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS
{
public uint value;
}
[StructLayout(LayoutKind.Sequential)]
public struct DISPLAYCONFIG_DEVICE_INFO_HEADER
{
public DISPLAYCONFIG_DEVICE_INFO_TYPE type;
public uint size;
public LUID adapterId;
public uint id;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct DISPLAYCONFIG_TARGET_DEVICE_NAME
{
public DISPLAYCONFIG_DEVICE_INFO_HEADER header;
public DISPLAYCONFIG_TARGET_DEVICE_NAME_FLAGS flags;
public DISPLAYCONFIG_VIDEO_OUTPUT_TECHNOLOGY outputTechnology;
public ushort edidManufactureId;
public ushort edidProductCodeId;
public uint connectorInstance;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)]
public string monitorFriendlyDeviceName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string monitorDevicePath;
}
#endregion
#region DLL-Imports
[DllImport("user32.dll")]
public static extern int GetDisplayConfigBufferSizes(
QUERY_DEVICE_CONFIG_FLAGS flags, out uint numPathArrayElements, out uint numModeInfoArrayElements);
[DllImport("user32.dll")]
public static extern int QueryDisplayConfig(
QUERY_DEVICE_CONFIG_FLAGS flags,
ref uint numPathArrayElements, [Out] DISPLAYCONFIG_PATH_INFO[] PathInfoArray,
ref uint numModeInfoArrayElements, [Out] DISPLAYCONFIG_MODE_INFO[] ModeInfoArray,
IntPtr currentTopologyId
);
[DllImport("user32.dll")]
public static extern int DisplayConfigGetDeviceInfo(ref DISPLAYCONFIG_TARGET_DEVICE_NAME deviceName);
#endregion
private static string MonitorFriendlyName(LUID adapterId, uint targetId)
{
var deviceName = new DISPLAYCONFIG_TARGET_DEVICE_NAME
{
header =
{
size = (uint)Marshal.SizeOf(typeof (DISPLAYCONFIG_TARGET_DEVICE_NAME)),
adapterId = adapterId,
id = targetId,
type = DISPLAYCONFIG_DEVICE_INFO_TYPE.DISPLAYCONFIG_DEVICE_INFO_GET_TARGET_NAME
}
};
var error = DisplayConfigGetDeviceInfo(ref deviceName);
if (error != ERROR_SUCCESS)
throw new Win32Exception(error);
return deviceName.monitorFriendlyDeviceName;
}
private static IEnumerable<string> GetAllMonitorsFriendlyNames()
{
uint pathCount, modeCount;
var error = GetDisplayConfigBufferSizes(QUERY_DEVICE_CONFIG_FLAGS.QDC_ONLY_ACTIVE_PATHS, out pathCount, out modeCount);
if (error != ERROR_SUCCESS)
throw new Win32Exception(error);
var displayPaths = new DISPLAYCONFIG_PATH_INFO[pathCount];
var displayModes = new DISPLAYCONFIG_MODE_INFO[modeCount];
error = QueryDisplayConfig(QUERY_DEVICE_CONFIG_FLAGS.QDC_ONLY_ACTIVE_PATHS,
ref pathCount, displayPaths, ref modeCount, displayModes, IntPtr.Zero);
if (error != ERROR_SUCCESS)
throw new Win32Exception(error);
for (var i = 0; i < modeCount; i++)
if (displayModes[i].infoType == DISPLAYCONFIG_MODE_INFO_TYPE.DISPLAYCONFIG_MODE_INFO_TYPE_TARGET)
yield return MonitorFriendlyName(displayModes[i].adapterId, displayModes[i].id);
}
public static string DeviceFriendlyName(this Screen screen)
{
var allFriendlyNames = GetAllMonitorsFriendlyNames();
for (var index = 0; index < Screen.AllScreens.Length; index++)
if (Equals(screen, Screen.AllScreens[index]))
return allFriendlyNames.ToArray()[index];
return null;
}
}

System Driver Listing In c#

i am working on listing installed drivers in system as in Device manager.
I got that list from Win32_PnPSignedDriver but it does not provide icons. Is there any way to find that or i have to add custom icons for the list. I want to generate output Like same as in Device manager.I found some reference in C/C++ but not in c#.

Here are two utility classes DeviceClass and Device that demonstrate how to do it. They don't use WMI, but the setupapi with p/invoke (and the System.Drawing's Icon class). I think this API is the only supported way to get the icon. You could then use WMI (using ids, and class ids to get more information this time using WMI).
Here is a comparison using these classes, in a Windows Form, and the Device Manager, as you see it's pretty close, but the class icon is not exactly the same, I don't know why, I've not investigated.
Last note: as expected, some devices have an icon that is different from their class and different from other icons in the same class. We can observe that in the first Audio class, the two devices don't have the same icon.
Here is the code:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// This is a standard Form. I have added a TreeView control and an ImageList to the Form.
// The image list is bound to the treeview, with ColorDepth set to Depth32Bit
var classes = DeviceClass.Load(DeviceFiter.AllClasses | DeviceFiter.Present);
foreach (var cls in classes)
{
var classNode = treeView1.Nodes.Add(cls.Description);
imageList1.Images.Add(cls.Icon);
classNode.ImageIndex = imageList1.Images.Count - 1;
classNode.SelectedImageIndex = classNode.ImageIndex;
foreach (var device in cls.Devices)
{
var deviceNode = classNode.Nodes.Add(device.Name);
imageList1.Images.Add(device.Icon);
deviceNode.ImageIndex = imageList1.Images.Count - 1;
deviceNode.SelectedImageIndex = deviceNode.ImageIndex;
}
classNode.Expand();
}
// dispose (icons)
foreach (var cls in classes)
{
foreach (var device in cls.Devices)
{
device.Dispose();
}
cls.Dispose();
}
}
}
public class DeviceClass : IDisposable, IComparable, IComparable<DeviceClass>
{
private List<Device> _devices = new List<Device>();
private Icon _icon;
internal DeviceClass(Guid classId, string description)
{
ClassId = classId;
Description = description;
}
public Guid ClassId { get; }
public string Description { get; }
public Icon Icon => _icon;
public IReadOnlyList<Device> Devices => _devices;
public static IReadOnlyList<DeviceClass> Load(DeviceFiter fiter)
{
var list = new List<DeviceClass>();
var hdevinfo = SetupDiGetClassDevs(IntPtr.Zero, null, IntPtr.Zero, fiter);
try
{
var data = new SP_DEVINFO_DATA();
data.cbSize = Marshal.SizeOf<SP_DEVINFO_DATA>();
int index = 0;
while (SetupDiEnumDeviceInfo(hdevinfo, index, ref data))
{
index++;
var classId = GetGuidProperty(hdevinfo, ref data, DEVPKEY_Device_ClassGuid);
if (classId == Guid.Empty)
continue;
string classDescription = GetClassDescription(classId);
var cls = list.FirstOrDefault(c => c.ClassId == classId);
if (cls == null)
{
cls = new DeviceClass(classId, classDescription);
list.Add(cls);
SetupDiLoadClassIcon(ref classId, out IntPtr clsIcon, out int mini);
if (clsIcon != IntPtr.Zero)
{
cls._icon = Icon.FromHandle(clsIcon);
}
}
string name = GetStringProperty(hdevinfo, ref data, DEVPKEY_Device_FriendlyName);
if (string.IsNullOrWhiteSpace(name))
{
name = GetStringProperty(hdevinfo, ref data, DEVPKEY_Device_DeviceDesc);
}
Icon icon = null;
SetupDiLoadDeviceIcon(hdevinfo, ref data, 16, 16, 0, out IntPtr devIcon);
if (devIcon != IntPtr.Zero)
{
icon = Icon.FromHandle(devIcon);
}
var dev = new Device(cls, name, icon);
cls._devices.Add(dev);
}
}
finally
{
if (hdevinfo != IntPtr.Zero)
{
SetupDiDestroyDeviceInfoList(hdevinfo);
}
}
foreach (var cls in list)
{
cls._devices.Sort();
}
list.Sort();
return list;
}
int IComparable.CompareTo(object obj) => CompareTo(obj as DeviceClass);
public int CompareTo(DeviceClass other)
{
if (other == null)
throw new ArgumentNullException(nameof(other));
return Description.CompareTo(other.Description);
}
public void Dispose()
{
if (_icon != null)
{
_icon.Dispose();
_icon = null;
}
}
private static string GetClassDescription(Guid classId)
{
SetupDiGetClassDescription(ref classId, IntPtr.Zero, 0, out int size);
if (size == 0)
return null;
var ptr = Marshal.AllocCoTaskMem(size * 2);
try
{
if (!SetupDiGetClassDescription(ref classId, ptr, size, out size))
throw new Win32Exception(Marshal.GetLastWin32Error());
return Marshal.PtrToStringUni(ptr, size - 1);
}
finally
{
Marshal.FreeCoTaskMem(ptr);
}
}
private static string GetStringProperty(IntPtr hdevinfo, ref SP_DEVINFO_DATA data, DEVPROPKEY pk)
{
SetupDiGetDeviceProperty(hdevinfo, ref data, ref pk, out int propertyType, IntPtr.Zero, 0, out int size, 0);
if (size == 0)
return null;
var ptr = Marshal.AllocCoTaskMem(size);
try
{
if (!SetupDiGetDeviceProperty(hdevinfo, ref data, ref pk, out propertyType, ptr, size, out size, 0))
throw new Win32Exception(Marshal.GetLastWin32Error());
return Marshal.PtrToStringUni(ptr, (size / 2) - 1);
}
finally
{
Marshal.FreeCoTaskMem(ptr);
}
}
private static Guid GetGuidProperty(IntPtr hdevinfo, ref SP_DEVINFO_DATA data, DEVPROPKEY pk)
{
SetupDiGetDeviceProperty(hdevinfo, ref data, ref pk, out int propertyType, out Guid guid, 16, out int size, 0);
return guid;
}
[StructLayout(LayoutKind.Sequential)]
private struct SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public int DevInst;
public IntPtr Reserved;
}
[StructLayout(LayoutKind.Sequential)]
private struct DEVPROPKEY
{
public Guid fmtid;
public int pid;
}
private const int ERROR_NOT_FOUND = 118;
private const int ERROR_INSUFFICIENT_BUFFER = 122;
private static readonly DEVPROPKEY DEVPKEY_Device_DeviceDesc = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 2 };
private static readonly DEVPROPKEY DEVPKEY_Device_FriendlyName = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 14 };
private static readonly DEVPROPKEY DEVPKEY_Device_Class = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 9 };
private static readonly DEVPROPKEY DEVPKEY_Device_ClassGuid = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 10 };
[DllImport("setupapi", CharSet = CharSet.Unicode)]
private static extern IntPtr SetupDiGetClassDevs(IntPtr ClassGuid, [MarshalAs(UnmanagedType.LPWStr)] string Enumerator, IntPtr hwndParent, DeviceFiter Flags);
[DllImport("setupapi", SetLastError = true)]
private static extern bool SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
[DllImport("setupapi", SetLastError = true)]
private static extern bool SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, int MemberIndex, ref SP_DEVINFO_DATA DeviceInfoData);
[DllImport("setupapi", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiGetClassDescription(ref Guid ClassGuid, IntPtr ClassDescription, int ClassDescriptionSize, out int RequiredSize);
[DllImport("setupapi", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiLoadClassIcon(ref Guid ClassGuid, out IntPtr LargeIcon, out int MiniIconIndex);
[DllImport("setupapi", SetLastError = true)]
private static extern bool SetupDiLoadDeviceIcon(IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData,
int cxIcon, int cyIcon, int Flags, out IntPtr hIcon);
[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiGetDeviceProperty(IntPtr DeviceInfoSet,
ref SP_DEVINFO_DATA DeviceInfoData,
ref DEVPROPKEY PropertyKey,
out int PropertyType,
IntPtr PropertyBuffer,
int PropertyBufferSize,
out int RequiredSize,
int Flags);
[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiGetDeviceProperty(IntPtr DeviceInfoSet,
ref SP_DEVINFO_DATA DeviceInfoData,
ref DEVPROPKEY PropertyKey,
out int PropertyType,
out Guid PropertyBuffer,
int PropertyBufferSize,
out int RequiredSize,
int Flags);
}
[Flags]
public enum DeviceFiter // DIGCF_* flags
{
Default = 1,
Present = 2,
AllClasses = 4,
Profile = 8,
DeviceInterface = 16
}
public class Device : IDisposable, IComparable, IComparable<Device>
{
internal Device(DeviceClass cls, string name, Icon icon)
{
Class = cls;
Name = name;
Icon = icon;
}
public string Name { get; }
public DeviceClass Class { get; }
public Icon Icon { get; private set; }
public override string ToString() => Name;
public void Dispose()
{
if (Icon != null)
{
Icon.Dispose();
Icon = null;
}
}
int IComparable.CompareTo(object obj) => CompareTo(obj as Device);
public int CompareTo(Device other)
{
if (other == null)
throw new ArgumentNullException(nameof(other));
return Name.CompareTo(other.Name);
}
}

There is a nice article using SHGetFileInfo function to get associated icons, i'd recommend looking into that.
You cannot do it using pure .Net or C# you will need this dll in the article.
EDIT
Maybe this MDSN Device Information will be of help

I think many of us having some errors with #Simon's codes.
Here are his revised codes:
public class DeviceClass : IDisposable, IComparable, IComparable<DeviceClass>
{
private List<Device> _devices = new List<Device>();
private Icon _icon;
internal DeviceClass(Guid classId, string description)
{
ClassId = classId;
Description = description;
}
public Guid ClassId { get; }
public string Description { get; }
public Icon Icon => _icon;
public IReadOnlyList<Device> Devices => _devices;
public static IReadOnlyList<DeviceClass> Load(DeviceFiter fiter)
{
var list = new List<DeviceClass>();
var hdevinfo = SetupDiGetClassDevs(IntPtr.Zero, null, IntPtr.Zero, fiter);
try
{
var data = new SP_DEVINFO_DATA();
data.cbSize = System.Runtime.InteropServices.Marshal.SizeOf<SP_DEVINFO_DATA>();
int index = 0;
while (SetupDiEnumDeviceInfo(hdevinfo, index, ref data))
{
index++;
var classId = GetGuidProperty(hdevinfo, ref data, DEVPKEY_Device_ClassGuid);
if (classId == Guid.Empty)
continue;
string classDescription = GetClassDescription(classId);
var cls = list.FirstOrDefault(c => c.ClassId == classId);
if (cls == null)
{
cls = new DeviceClass(classId, classDescription);
list.Add(cls);
IntPtr clsIcon;
int mini;
SetupDiLoadClassIcon(ref classId, out clsIcon, out mini);
if (clsIcon != IntPtr.Zero)
{
cls._icon = Icon.FromHandle(clsIcon);
}
}
string name = GetStringProperty(hdevinfo, ref data, DEVPKEY_Device_FriendlyName);
if (string.IsNullOrWhiteSpace(name))
{
name = GetStringProperty(hdevinfo, ref data, DEVPKEY_Device_DeviceDesc);
}
Icon icon = null;
IntPtr devIcon;
SetupDiLoadDeviceIcon(hdevinfo, ref data, 16, 16, 0, out devIcon);
if (devIcon != IntPtr.Zero)
{
icon = Icon.FromHandle(devIcon);
}
var dev = new Device(cls, name, icon);
cls._devices.Add(dev);
}
}
finally
{
if (hdevinfo != IntPtr.Zero)
{
SetupDiDestroyDeviceInfoList(hdevinfo);
}
}
foreach (var cls in list)
{
cls._devices.Sort();
}
list.Sort();
return list;
}
int IComparable.CompareTo(object obj) => CompareTo(obj as DeviceClass);
public int CompareTo(DeviceClass other)
{
if (other == null)
throw new ArgumentNullException(nameof(other));
return Description.CompareTo(other.Description);
}
public void Dispose()
{
if (_icon != null)
{
_icon.Dispose();
_icon = null;
}
}
private static string GetClassDescription(Guid classId)
{
int size = 0;
SetupDiGetClassDescription(ref classId, IntPtr.Zero, 0, out size);
if (size == 0)
return null;
var ptr = Marshal.AllocCoTaskMem(size * 2);
try
{
if (!SetupDiGetClassDescription(ref classId, ptr, size, out size))
throw new Win32Exception(Marshal.GetLastWin32Error());
return Marshal.PtrToStringUni(ptr, size - 1);
}
finally
{
Marshal.FreeCoTaskMem(ptr);
}
}
private static string GetStringProperty(IntPtr hdevinfo, ref SP_DEVINFO_DATA data, DEVPROPKEY pk)
{
int propertyType;
int size;
SetupDiGetDeviceProperty(hdevinfo, ref data, ref pk, out propertyType, IntPtr.Zero, 0, out size, 0);
if (size == 0)
return null;
var ptr = Marshal.AllocCoTaskMem(size);
try
{
if (!SetupDiGetDeviceProperty(hdevinfo, ref data, ref pk, out propertyType, ptr, size, out size, 0))
throw new Win32Exception(Marshal.GetLastWin32Error());
return Marshal.PtrToStringUni(ptr, (size / 2) - 1);
}
finally
{
Marshal.FreeCoTaskMem(ptr);
}
}
private static Guid GetGuidProperty(IntPtr hdevinfo, ref SP_DEVINFO_DATA data, DEVPROPKEY pk)
{
int propertyType, size;
Guid guid;
SetupDiGetDeviceProperty(hdevinfo, ref data, ref pk, out propertyType, out guid, 16, out size, 0);
return guid;
}
[StructLayout(LayoutKind.Sequential)]
private struct SP_DEVINFO_DATA
{
public int cbSize;
public Guid ClassGuid;
public int DevInst;
public IntPtr Reserved;
}
[StructLayout(LayoutKind.Sequential)]
private struct DEVPROPKEY
{
public Guid fmtid;
public int pid;
}
private const int ERROR_NOT_FOUND = 118;
private const int ERROR_INSUFFICIENT_BUFFER = 122;
private static readonly DEVPROPKEY DEVPKEY_Device_DeviceDesc = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 2 };
private static readonly DEVPROPKEY DEVPKEY_Device_FriendlyName = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 14 };
private static readonly DEVPROPKEY DEVPKEY_Device_Class = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 9 };
private static readonly DEVPROPKEY DEVPKEY_Device_ClassGuid = new DEVPROPKEY { fmtid = new Guid("a45c254e-df1c-4efd-8020-67d146a850e0"), pid = 10 };
[DllImport("setupapi", CharSet = CharSet.Unicode)]
private static extern IntPtr SetupDiGetClassDevs(IntPtr ClassGuid, [MarshalAs(UnmanagedType.LPWStr)] string Enumerator, IntPtr hwndParent, DeviceFiter Flags);
[DllImport("setupapi", SetLastError = true)]
private static extern bool SetupDiDestroyDeviceInfoList(IntPtr DeviceInfoSet);
[DllImport("setupapi", SetLastError = true)]
private static extern bool SetupDiEnumDeviceInfo(IntPtr DeviceInfoSet, int MemberIndex, ref SP_DEVINFO_DATA DeviceInfoData);
[DllImport("setupapi", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiGetClassDescription(ref Guid ClassGuid, IntPtr ClassDescription, int ClassDescriptionSize, out int RequiredSize);
[DllImport("setupapi", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiLoadClassIcon(ref Guid ClassGuid, out IntPtr LargeIcon, out int MiniIconIndex);
[DllImport("setupapi", SetLastError = true)]
private static extern bool SetupDiLoadDeviceIcon(IntPtr DeviceInfoSet, ref SP_DEVINFO_DATA DeviceInfoData,
int cxIcon, int cyIcon, int Flags, out IntPtr hIcon);
[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiGetDeviceProperty(IntPtr DeviceInfoSet,
ref SP_DEVINFO_DATA DeviceInfoData,
ref DEVPROPKEY PropertyKey,
out int PropertyType,
IntPtr PropertyBuffer,
int PropertyBufferSize,
out int RequiredSize,
int Flags);
[DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern bool SetupDiGetDeviceProperty(IntPtr DeviceInfoSet,
ref SP_DEVINFO_DATA DeviceInfoData,
ref DEVPROPKEY PropertyKey,
out int PropertyType,
out Guid PropertyBuffer,
int PropertyBufferSize,
out int RequiredSize,
int Flags);
}
[Flags]
public enum DeviceFiter // DIGCF_* flags
{
Default = 1,
Present = 2,
AllClasses = 4,
Profile = 8,
DeviceInterface = 16
}
public class Device : IDisposable, IComparable, IComparable<Device>
{
internal Device(DeviceClass cls, string name, Icon icon)
{
Class = cls;
Name = name;
Icon = icon;
}
public string Name { get; }
public DeviceClass Class { get; }
public Icon Icon { get; private set; }
public override string ToString() => Name;
public void Dispose()
{
if (Icon != null)
{
Icon.Dispose();
Icon = null;
}
}
int IComparable.CompareTo(object obj) => CompareTo(obj as Device);
public int CompareTo(Device other)
{
if (other == null)
throw new ArgumentNullException(nameof(other));
return Name.CompareTo(other.Name);
}
}

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