总结了Windows获取系统分辨率的几种方式,以及修改系统显示比例对每种方式的影响.

         假设本机的系统分辨率为1920*1080,测试结果和代码如下:

/*-____________________________________________________________________________________________
|系统比例 		        | SM_CXSCREEN | SM_CXFULLSCREEN  | GetDeviceCaps  | QueryDisplayConfig|
________________________|_____________ |_________________|________________ |___________________|
|	100%	      |	 1920	   | 	 1920	   | 1920           |	1920          |
________________________|_____________ |_________________|_______________|___________________ |
|	150	      |	 1280       |      1280	   | 1280           |	1920          | 
|_______________________|_____________|__________________|________________ |__________________*/	
/*
	//获取系统整个区域
	int x_FullScreen = GetSystemMetrics(SM_CXFULLSCREEN);
	
	//获取除去任务栏的区域
	int x_FullScreen = GetSystemMetrics(SM_CXFULLSCREEN);

	int x_CAPSScreen = GetDeviceCaps( hdc, HORZRES ); 

	UI