BFM_INPUT_MOUSE

BFM_INPUT_MOUSELEFT	Left mouse button.
BFM_INPUT_MOUSERIGHT	Right mouse button.
BFM_INPUT_MOUSEMIDDLE	Middle mouse button.
BFM_INPUT_MOUSEX1	Fourth mouse button.
BFM_INPUT_MOUSEX2	Five mouse button.
BFM_INPUT_MOUSEWHEEL	Mouse wheel message.
BFM_INPUT_MOUSEMOVE	Mouse move message.