#include <CoreFoundation/CoreFoundation.h>

int main(int argc, char ** argv)
{
	CFMessagePortRef port = CFMessagePortCreateRemote(NULL, CFSTR ("com.apple.loginwindow.notify"));
	CFMessagePortSendRequest(port, 500, 0, 0, 0, 0, 0);
	CFRelease(port);
	return 0;
}