将窗口居中

//一个小小的窗口居中操作
	int scrWidth,scrHeight;
	RECT rect;
	//获得屏幕尺寸
	scrWidth=GetSystemMetrics(SM_CXSCREEN);
	scrHeight=GetSystemMetrics(SM_CYSCREEN);
	//获取窗体尺寸
	GetWindowRect(hwnd,&rect);
	rect.left=(scrWidth-rect.right)/2;
	rect.top=(scrHeight-rect.bottom)/2;
	
    MoveWindow(hwnd,rect.left,rect.top,SCREEN_WIDTH,SCREEN_LEIGHT,true);   //调整窗口显示时的位置，居中窗口