[fpc-pascal] KeyDown routine and Ctrl+Q

Vojtěch Čihák vojtech.cihak at atlas.cz
Wed Feb 8 23:26:05 CET 2017

when you press CTRL+Q you will obtain two OnKeyDown events. The first with Key=17 (it is CTRL) and the second with Key=81 (Q). Both events will have ssCtrl in Shift.
> Od: Jürgen Hestermann <juergen.hestermann at gmx.de>
> Komu: FPC-Pascal users discussions <fpc-pascal at lists.freepascal.org>
> Datum: 08.02.2017 22:12
> Předmět: [fpc-pascal] KeyDown routine and Ctrl+Q
I use a KEYDOWN routine in my main TFORM to check for the key Ctrl+Q:
 procedure TForm1.FormKeyDown(Sender : TObject;
                          var Key    : Word;
                              Shift  : TShiftState);
 begin // TForm1.FormKeyDown
 case key of
    VK_Q :
       if Shift=[ssCtrl] then
 But when I type "Ctrl+Q" then "Key" is 17 instead of VK_Q (81).
 If I now use 17 to trigger the "Q" key, then it is also triggered
 when I just type the Ctrl-key (without any other key)!
 This is all a bit weird.
 How can I detect that "Ctrl+Q" is pressed without
 getting fooled by any other key?
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