Get the current mouse location (coordinates and screen number).
@param x integer pointer where the X coordinate will be stored
@param y integer pointer where the Y coordinate will be stored
@param screen_num integer pointer where the screen number will be stored
Get the current mouse location (coordinates and screen number).
@param x integer pointer where the X coordinate will be stored @param y integer pointer where the Y coordinate will be stored @param screen_num integer pointer where the screen number will be stored