Thanks again for your help. However, I am not getting this to work. The object rotates by just moving the mouse, even if no mouse button is pressed. Here is my code:

Code:
if (mouse_left){
action rotate()
{
  while(1)
 	{
 	  my.pan += mouse_force.x;	// mouse movement changes PAN 
 	  my.tilt += mouse_force.y;	// mouse movement changes TILT
 	  wait(1);
 	}
}
}