Utility to display keyboard key codes when I press keys


Does anyone know of a utility that will display the code that is transmitted by the keyboard when a key is pressed?


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Not off-hand, but it would be easy to write.  Are you looking for code in any particular language, or just an executable?

Which OS?

FWIW, here's an MS C console app that does just that:

#include "stdafx.h"
#include <conio.h>
#include <stdio.h>
char c;

int main(int argc, char* argv[])
// Drain keyboard buff
while (_kbhit()) _getch();

// Keep going until = is hit
while (c!='=')
      // Note that CTRL-C (3) is not caught here
      if (_kbhit())
         if (c==0 || c==0xe0)
            // Special key
            printf("* %d\n",c);
return 0;

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This is the Visual Basic one:

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
    MsgBox "Key Pressed: " & KeyCode
End Sub
if you need in any other languages let me know
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