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is it possible to detect which keys are used for a system volume accelerator in win32 using c++? For example: if the user presses fn + key up (and this is also the key combination to change the system volume), i would like to detect this event and response to it.
This is handled by the machine’s BIOS. It produces a keystroke, VK_VOLUME_DOWN or VK_VOLUME_UP virtual key. DefWindowProc handling of that WM_KEYDOWN message produces WM_APPCOMMAND, APPCOMMAND_VOLUME_UP/DOWN. DefWindowProc handling of that message adjusts the volume.