MFC对话框屏幕居中

// 对话框屏幕居中
	ShowWindow(SW_NORMAL);
	CRect rtDesk;
	CRect rtDlg;
	::GetWindowRect(::GetDesktopWindow(), &rtDesk);
	GetWindowRect(&rtDlg);
	int iXpos = rtDesk.Width() / 2 - rtDlg.Width() / 2;
	int iYpos = rtDesk.Height() / 2 - rtDlg.Height() / 2;
	SetWindowPos(NULL, iXpos, iYpos, 0, 0, SWP_NOOWNERZORDER|SWP_NOSIZE|SWP_NOZORDER);