video_set(1024,768,24,1);
	desktopWidth = sys_metrics(0);  
	desktopHeight = sys_metrics(1);

	if (desktopWidth<1681) 
	{
		video_set(desktopWidth,desktopHeight,0,1);
	}
	else
	{
		 if 	(desktopWidth/4  == desktopHeight/3)	//Classic
		{
		
			video_set(1024,768,0,1);
			desktopWidth = 1024;
			desktopHeight = 768;
		}
		 if (desktopWidth/15 == desktopHeight/9)	//BrightView
		{
			video_set(1280,768,0,1);
			desktopWidth = 1280;
			desktopHeight = 768;
		}
		 if (desktopWidth/5  == desktopHeight/4)	//SXGA
		{
			video_set(1280,1024,0,1);
			desktopWidth = 1280;
			desktopHeight = 1024;
		}
		 if (desktopWidth/16 == desktopHeight/10)	//WSXGA+
		{
			video_set(1680,1050,0,1);
			desktopWidth = 1680;
			desktopHeight = 1050;	
		}
		else   //Window Mode
		{
			video_set(1024,768,32,2); 
			video_window(nullvector,nullvector,1,NULL);
			wait(1);	// must put this. not sure the reason
			desktopWidth = screen_size.x;
			desktopHeight = screen_size.y;
		}
	}