学步园

 CRect rtClient;
 SystemParametersInfo(SPI_GETWORKAREA, 0, &rtClient, 0);//屏幕大小(不含任务栏)
 int nScreenWidth = ::GetSystemMetrics(SM_CXSCREEN);//屏幕大小(含任务栏)
 int nScreenHeigth = ::GetSystemMetrics(SM_CYSCREEN);
 CRect rtTaskbar;//任务栏大小
 rtTaskbar = rtClient;
 rtTaskbar.top = rtClient.bottom;
 rtTaskbar.bottom = nScreenHeigth;