rem: return _control_input_server_(&command, &reply) == B_OK;
add: return _control_input_server_(&command, &reply);
context: set_mouse_speed(int32 speed){	BMessage command(IS_SET_MOUSE_SPEED);	BMessage reply;	command.AddInt32("speed", speed);	return _control_input_server_(&command, &reply) == B_OK;}