I created one desktop application in C# with installation version.
I installed this application onto the machine. Now I want to open this application by pressing the Ctrl key of keyboard.
That is when the user press the Ctrl key my installed application is open.
How can I open a particular search page of my application by pressing a particular key of the keyboard?
Like the Picasa software.
Well this is no programming but a Windows feature. You have to define a shortcut for that application by opening the property page of that shortcut. There under the shortcut tab you can define the shortcut keys.
For the search key you probably have to attach your main form to the KeyPress event.
Defining key in Shortcut (link) properties would work but not if want just the Control key to activate. To do this you need another application, running in background and auto-starting that listens to keyboard events (hooks).
Related
i have problem i'm trying to do new shortcut but if i put the shortcut i made F11 then will happen is full screen , i want to disable Keyboard inputs form windows or just disable the actions form windows i mean (if i press any key i want to put the action not windows put the action)
i create application that raises the volume , i put the volume up "F11" but in google chrome F11 is full screen, there anther application if i press F11 or F10 or F9 it do something and i dont want this happen.
i'm using Visual Studio Windows forms C#
note: my application work in background (i dont want use From1_KeyUp or Down i know this code)
Thank You for help
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To prevent keys from reaching the target application you must use a low-level keyboard hook and return a non-zero value when you performed your own custom action.
I want to assign a keyboard shortcut to launch my wpf application like window+E for windows explorer.
How can I achieve it?
I know how to assign keys by creating shortcut link of program.But I want the same behavior on every machine .So that if someone presses a Key my WPF program launches.
You have to create a separate application/service, which will have to register a global hotkey, and you can start your application from that app/service.
See this article for more details on how to set up a global hotkey in c#.
Or you can distribute a shortcut with your application with already set up hotkey, and place it in one of those folders during installation:
%UserProfile%\desktop
%AllUsersProfile%\desktop
%UserProfile%\Start Menu
%AllUsersProfile%\Start Menu
This should also work, as this hotkeys are not stored in the registry, but are scanned at logon (and only from those 4 folders) and are actually kept in memory (source: this thread).
Of course this latter option has the drawback to only work with Alt + Ctrl modifiers, as all shourtcut hotkeys.
I want to essentially absorb key presses.
I'm currently using key preview on my main form and have an event handler for a key press that checks if the windows key is pressed. Is there a way to prevent the key press for leaving the application and opening the start menu?
There is an option for specific controls to suppress a key press, is there a way to suppress a key press to Windows?
The only way to intercept keyboard events outside your application is with P/Invoke SetWindowsHookEx. This will set a global callback to keyboard events agnostic of the focused application.
Several places to start looking:
How to disable windows startmenu using vb.net?
Disable Windows Key [Resolved] - has a reference to SetWindowsHookEx
Disable CONTROL + ALT + DELETE and Windows(win) Key in Windows 7 using Win32 application
I want to know how can i detect which key pressed (for example on Desktop or my computer ).
when detect pressed key show it with MessageBox
how can i do this?
Detecting the key presses outside of your application requires installing a Low Level Keyboard Hook. Here is a CodeProject article demonstrating the process.
How do I trap Windows key, Alt+Tab, and Ctrl+Alt+Delete in a Windows application using C#?
You can capture Ctrl-Alt-Delete. But you need to implement your own GINA dll which is loaded by Winlogon.
You'll need to code this up in C or C++ as it needs to be a native DLL.
As Jan stated, you can't capture CTRL-ALT-DEL without writing your own GINA.
For the Windows or ALT-TAB keys, you can look at these for help:
Capturing Keystrokes without Focus (SO near-duplicate)
How To Set A Windows Hook
Hooks (low-level, but will explain what you need for the P/Invoke)
Almost by definition, you can't "trap" ctrl-alt-delete.
AFAIK Ctrl + Alt + Delete cannot be captured using an application.
See this question to get some more idea: How to trap the keyboard strokes on a c# win forms application (CTRl + alt +Del)
Some Remote Management Software and Virtual Machines do this. If you press [CTRL]+[ALT]+[DEL] the specific Windows Dialog will still opens, but the Application also displays, that you have pressed [CTRL]+[ALT]+[DEL] and probably wanted it t become effective on the Target Machine and not your host. It seams rather easy to capture these keys, but cancelling the Event may be harder.