You receive a series of mouse drag messages (typically one per frame in the sim) as the mouse is
moved once you have accepted a mouse down message. Parameter one points to a mouse-state structure
describing the mouse location. You will continue to receive these until the mouse button is
You may receive multiple mouse state messages with the same mouse position. You will receive mouse
drag events even if the mouse is dragged out of your current or original bounds at the time of the
Param 1: A pointer to an XPMouseState_t containing the mouse status.