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problem with keypress VS keydown

Posted on 2004-09-29
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Last Modified: 2008-02-01
I put some coding both in the keypress event and keydown event. but the keypress event is not fired why? is it keydown suppress keypress?
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Question by:jessi_vs
6 Comments
 
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Expert Comment

by:hongjun
ID: 12177486
post your code.
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Expert Comment

by:ADSaunders
ID: 12177538
Hi jessi_vs,
Is the keypress event in the form or in a control on the form? If it is on the form, the keypress will only be seen if the KeyPreview property of the form is set to true.

Regards .. Alan
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Expert Comment

by:mladenovicz
ID: 12177755
keypress event occurs when the user presses and releases an ANSI key.The object with the focus receives the event.
keydown event occurs when the user presses a key while an object has the focus.

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Expert Comment

by:jkaios
ID: 12187451
Yes, if both the KeyDown and KeyPress events are present, then the "KeyDown" event would fire, thus suppressing the KeyPress event.
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Author Comment

by:jessi_vs
ID: 12187473
thanks, let me check it up. both events or in a textbox.
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Accepted Solution

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jkaios earned 20 total points
ID: 12187772
Perhaps you might want to try this to confirm.

1. Place a text box on the form and call it Text1
2. Paste the following codes below
3. Run your app the hit some key -- you should confirm that only the KeyDown event fires

-----------------[Start of Code] ----------------------------------------------------------------

Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)
 MsgBox "KeyCode = " & KeyCode, , "Text1_KeyDown"
End Sub

Private Sub Text1_KeyPress(KeyAscii As Integer)
 MsgBox "KeyAscii = " & KeyAscii, , "Text1_KeyPress"
End Sub

-----------------[End of Code] -----------------------------------------------------------------

P.S.
  The advantage of KeyDown event is that it can detect the Navigation keys, such as
  the PageUp, PageDown, Home, End keys. It can also detect the Delete and Back Space
  and the Function keys.
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