How to catch ESC key press with WndProc?

Question

How to catch an ESC KeyPress using WndProc?

I'm assuming that you mean while your form has focus, in which case I'd go with tommeib's solution. If not, you should provide more info. — snarf, Mar 21 '10 at 14:01
This is not relevant for the OP, but for others who end up here the usual best way to handle Esc in a WinForms program is by overriding ProcessCmdKey. See the answer by Hans Passant on this thread: http://stackoverflow.com/questions/10468200/key-events-processcmdkey — RenniePet, Aug 07 '14 at 12:29

score 5 · Answer 1 · answered Nov 30 '10 at 15:10

5

Another option (for forms):

protected override bool ProcessKeyPreview(ref System.Windows.Forms.Message m)
{
  int VK_ESCAPE = 27;
  if (m.Msg == Win32Constants.WM_KEYDOWN && (int)m.WParam == VK_ESCAPE)
  {
    // ...
  }
  return base.ProcessKeyPreview(ref m);
}

answered Nov 30 '10 at 15:10

adjutant

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`WM_KEYDOWN` is `0x0100`, by the way. – Waescher Feb 04 '18 at 22:56

score 3 · Accepted Answer · answered Mar 21 '10 at 13:41

3

Why are you doing it this way? Why not set the PreviewKey property of the Form to true and set a global event handler for KeyUp and check it...

if (e.KeyCode == Keys.Esc){
   //...
}

answered Mar 21 '10 at 13:41

t0mm13b

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This won't work with certain keys, but it seems to work fine with the escape key. BTW, I believe it's KeyPreview. – snarf Mar 21 '10 at 14:00
Sank's, I already do that. I'm just searching for alternative way ) – Pritorian Mar 21 '10 at 14:35

score 0 · Answer 3 · answered Mar 21 '10 at 13:37

0

You need to catch the WM_CHAR message and check WParam.

answered Mar 21 '10 at 13:37

SLaks

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score 0 · Answer 4 · answered Mar 21 '10 at 13:55

0

(msg==WM_KEYDOWN) && (wParam==VK_ESCAPE) ... ops it was c#... sorry , that is win32 api way

answered Mar 21 '10 at 13:55

Luca Rocchi

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How to catch ESC key press with WndProc?

4 Answers4

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