detect mouse scroll even when form doesnt have focus

i need to detect if the mouse scroll wheel is moved even if the form doesnt have focus, kind of like what GetAsyncKeyState does to Form_Keypress.

thanks
Stuart

put the "GetAsyncKeyState" into a Timer that is set to 1

(I made a key counter program that does the same thing and what i did to get the key when it is pressed is put it into a Timer)