I'm facing a tough one right now, at least it's tough for me!
I'm using this code to capture key press events and it works just fine even when the window is out of focus.
In addition though, I'd like to be able to consume the key event before it is used by any other application that does have the focus right now.
Search after search has brought no result for me, does anyone know how this might be accomplished?
Im sure there is a simpliest way to to this (the code you use is old), but I've found this post. (Look at the code at the end)
Anyway, you can always use the 'KeyEventArgs.Handled = true;' property in the 'KeyDown' and 'KeyUp' event of your focused control to limite the key's propagation.
Here is the source code of a program that captures every key on windows, records it, and then passes it on to the next program.
You could take that code as a starting point and conditionally execute the call to CallNextHookEx to consume the keys.
Related
trying to write a program to flag a Key_up or Key_down event throughout the system, but I'm having a hard time with the implementation. I've seen a few posts on here that link to outdated articles on Global Hooks, but they are usually so old I cant get source code working, or theres really no explination of how it works.
I'm looking for some sort of implementation that's relitively simple (ie a library or DLL I can use, or if it's implemented by Visual Studio 2010 somewhere) as opposed to having several classes and files devoted to making a global hook.
The use of my code: I essentially want to extend the CTRL+C function to detect if CTRL is pressed, and if C and 1 are pressed (CTRL+C+1) I copy, but also store the copied text onto a notepad document.
So with that in mind it seems really extensive to design all this code only to hook onto the KeyDown/KeyUp that will be used for only 1 key
if this question has been answered recently please link me and I can close/edit this to not be redundant
OK, so almost immediately after posting this I found the sollution by re-wording my search :/ sorry to be 'that guy' everyone. BUT in the spirite of helpfulness here is a link to a SUPER quick way to get global hotkeys in your application:
http://www.dreamincode.net/forums/topic/180436-global-hotkeys/
this works for both creating new hotkeys and overriding old ones
I'm working on a Windows CE project and have run into a strange problem. When i display a messagebox the physical key stop working. The project relies solely on key input which work fine when changing focus between objects on the form. Because i can't slect an option from the message box, the application basically locks out.
I initially thought my keydown handler was to blame but i discovered the same issue regardless of the keydown handler (even in a new project it doesn't work)
I've been looking around online for information but the only thing i've come across involves changing messagebox buttons. The most prominent solution is to create your own messageboxes but it seems like a waste for what i need. Is there a more efficient way of solving this problem?
I'm creating a utility for my mother-in-law in order to remap CTRL-C and CTRL-V commands to one signal button on her keyboard to assist with at home work. On the first press it will commit a COPY command. Next press will be a PASTE command. Since my little application won't be in focus I'll need the use of GetAsyncKeyState. Right now I'm attempting to map this all to the tilde key. How do I kill the tilde key from actually passing to the field selected and overwriting the data or appending itself to the pasted text? Could either use C# in any .NET framework or VB6 for this little applet.
I understand the answer I'm looking for could assist in creating malicious software so if anyone should feel the need to not share or delete this question then by all means do so. I'm looking for an answer to a real issue or situation. I know I could map to a none typing key like Scroll Lock or Caps Lock like some other utilities out there but both of these keys are used at this point in time and not quite an option.
You going to have to do a global keyboard hook (see VBAccelerator for some details on global hooks in VB6), and then not pass on the message once you have received CTRL-V or CTRL-C and then act on that.
I am using the RegisterHotKey Win32 API to listen to the Ctrl_V key combination and using the WndProc method to handle this hot key notification. Now, even if I don't perform any operations in this method apart from calling base.WndProc(ref mesg), the Paste operation doesnt seem to be getting passed onto Windows and hence, paste is not working. I managed to get paste of text working by explicitly calling SendKeys("^V") but it is not working for non-text data. I also tried SendMessage Win32 API as below
SendMessage(foregroundWindowHandle, 0x302, 0, 0);
but even this is not working.
I am unable to figure out how to execute my code and then let Windows perform the paste for images, files etc. Any help in resolving this will be very timely and highly appreciated.
UPDATE: I figured out the problem was that the window where the Paste command was being generated wasnt getting the focus back. After correcting this, Paste is working fine for Notepad. Also, I am using Alt_Shift_V as the hot key now to avoid clashing with the default paste command. So pasting non-text data works fine. However, pasting text into Visual studio and Office applications is not working. SendKeys("^V") seems to be interpreted in a different way in these applications. Any idea on how to get this working?
Instead of registering a hotkey, register a global hook.
I have used global hooks to do something similar to what you are doing in the past and it works quite well.
Code for a simple and handy global hook implementation can be found at:
http://www.codeproject.com/KB/cs/globalhook.aspx
This would not interfere with the pasting operation :)
I think you should intercept the Ctrl-V Key message (through WndProc), do what you need and then let the base.WndProc handle the key message. You could also handle the OnKeyDown event.
In WinForms, you can set Form.KeyPreview to true in order to see messages before child controls.
Registering a hotkey isn't the solution if you just want to take some action and then pass on the message. It sounds like you'd need a keyboard hook instead (the SetWindowsHookEx API).
I'm programming an application consisting of three usercontrols in an main window.
In one of the usercontrols, there's a slider that needs to be controllable by keyboard input. The left arrow should decrease value, right button increase and so on. I have this work, but only when the slider has focus. If some other control has focus, I cant make it work at all.
Is it possible to define "global" hotkeys? IE keys that trigger the same event or function, no matter where the focus is? Hope I've made myself clear enough...
I have never tried this but If you have a command registered at the main window level with keys associated to it that might work. Keep in mind I have never done this but it is some thing you can try. If you are new to commands here is a blog post about it.
I have never rolled this my self but when using the built in past command I actually had to put code in to prevent it from happening in some cases.
I know this probably isn't much help but I hope it is enough to get you started.