rem: return _control_input_server_(&command, &reply) == B_OK;
add: return _control_input_server_(&command, &reply);
context: set_key_repeat_rate(int32 rate){	BMessage command(IS_SET_KEY_REPEAT_RATE);	BMessage reply;	command.AddInt32("rate", rate);	return _control_input_server_(&command, &reply) == B_OK;}