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Handling OEM characters in KeyDown?

Posted on 2003-04-01
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Last Modified: 2012-05-04
I need an editbox which
* has a canvas to display background image
* limited to accept a certain range of keystrokes
* prevent user from selecting its content by mouse

I descended my component from TCustomContol and captured KeyDown method:

procedure TMMEdit.KeyDown(var Key: Word; Shift: TShiftState);
begin
   if (Key = VK_Back) then begin

      if (length(fText)>0) then Delete( fText, Length(fText), 1);
   end
   else
      fText:= fText+ Char( key );

   repaint;
   inherited;
end;

My main problem is that fText:= fText+ Char( key ); doesn't work correctly for special characters like á, é, Õ, Ö.
How can I handle these OEM characters correctly?

Thanks,
Levente
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Question by:Levente
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2 Comments
 
LVL 34

Accepted Solution

by:
Slick812 earned 1000 total points
ID: 8249267
hello Levente , the WM_KeyDown message is before the Keystroke is Translated to the correct Character, if you want the actual Charaters then use the WM_CHAR message. . . which is the OnKeyPress, otherwize you'll maybe need to use the ToASCII
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Author Comment

by:Levente
ID: 8261463
I should've takne closer look into Windows' messages. Thanks
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