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Grabbing the KeyDown event of a Windows Form is a great way to implement behavior that depends on keyboard input. However, it has this annoying tendecy to "ding" if you use the alt key. Investigating this interesting behavior, I discovered that it occurs before the KeyDown event is raised. Luckily, there is a method that can be overridden to implement the proper code and handle it before it reaches the noisy underbelly of WinForms. The following code snipped illustrates grabbing alt-d. To use it with another key stroke, replace Keys with the ones you want.

protected override bool ProcessCmdKey(ref Message msg, Keys keyData)


if (keyData == (keyData | Keys.Alt | Keys.D))


//Do Something

return true;


return base.ProcessCmdKey(ref msg, keyData);


It is important that the base method only be called if your override is not handling the key press.

Posted on Tuesday, November 20, 2007 5:06 PM Kodefu | Back to top

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