Left ALT & Right ALT keys

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Moraldi (Posted 2007) [#1]

Does anyone knows how to check the RIGHT ALT and/or the LEFT ALT keys presses from within C (or C++) I know that WM_SYSKEYDOWN message contains this info but I didn't manage to handle Thanks!

Timeslip (Posted 2007) [#2]

Use 'GetAsyncKeyState(0x12)' to check for either alt key. If you want to check for the left/right keys individually, use 0xa4 for left and 0xa5 for right, but iirc that only works on windows 2000/xp.

Moraldi (Posted 2007) [#3]

Thanks Timeslip for your help (yes, I want to check the left/right alt keys individually) but I read in the MSDN Library this: "... Although the least significant bit of the return value indicates whether the key has been pressed since the last query, due to the pre-emptive multitasking nature of Windows, another application can call GetAsyncKeyState and receive the "recently pressed" bit instead of your application..." From all these above I understand that if another application call GetAsyncKeyState() then my application will not respond... EDIT: I checked your suggestion and it works fine...