SpQueryCapture

This function returns the handle of the window that has the pointer captured.

Syntax: hwnd = spQueryCapture ( [ hwndDesktop ] )

Parameter:

hwndDesktop – Desktop-window handle. If ommited the default desktop handle (HWND_DESKTOP) will be used

Returns:

0 – No window has the pointer captured, or an error occurred.
>0 – Handle of the window with the pointer captured.