设置对话框弹出位置（SetWindowPos）

设置对话框弹出位置在屏幕中心

	//调整对话框的位置test 2023.6.16
	CRect rectMain;
	GetWindowRect(&rectMain);
	CRect rectScreen;
	SystemParametersInfo(SPI_GETWORKAREA,0,&rectScreen,0);

	int nWidth=rectMain.Width();
	int nHeight=rectMain.Height();

	int nLeft=rectScreen.left+(rectScreen.Width()-nWidth)/2;
	int nTop=rectScreen.top+(rectScreen.Height()-nHeight)/2;

	SetWindowPos(NULL,nLeft,nTop,nWidth,nHeight,SWP_NOSIZE);
	//end