Tells about keys/mouse.
IsKeyDown(keycodes)
(i) keycodes @SHIFT and/or @CTRL.
(i) @YES if the key is down; @NO if the key is not down.
Determines if the Shift key or the Ctrl key is currently down.
Note: The right mouse button is the same as Shift, and the middle mouse button is the same as Ctrl.
IsKeyDown(@SHIFT) IsKeyDown(@CTRL) IsKeyDown(@CTRL | @SHIFT) IsKeyDown(@CTRL & @SHIFT) Message("IsKeyDown","Key Is Down.")