The GetKeyState Win API may work for you.

#DEFINE VK_BACK 08
DECLARE INTEGER GetKeyState IN WIN32API INTEGER
IF GetKeyState(VK_BACK) < 0
 * Backspace 
ENDIF

For list of codes see http://msdn2.microsoft.com/en-us/library/ms645540.aspx

>How can I make difference between CTRL-H and CTRL-Backspace ?
>both return nKeyCode=127 and nShiftAltCtrl=2
>
>I tried to test with nKeyCode with 0x11, but it doesn't work