確定對話框框架邊框的大小及重繪

void CMainFrame::DrawTitleBar(CDC *pDC)
{
	// TODO: 在此處添加消息處理程序代碼
	// 不爲繪圖消息調用 CFrameWnd::OnNcPaint()
	pDC->SelectStockObject(NULL_BRUSH);   
	pDC->SelectStockObject(NULL_PEN);

	CRect rtWnd, rtTitle, rtButtons;
	GetWindowRect(&rtWnd);

	//取得標題欄的位置
	//SM_CXFRAME 窗口邊框的邊緣寬度
	//SM_CYFRAME 窗口邊框的邊緣高度
	//SM_CXSIZE  窗口標題欄寬度
	//SM_CYSIZE  窗口標題欄高度
	rtTitle.left = GetSystemMetrics(SM_CXFRAME); 
	rtTitle.top = GetSystemMetrics(SM_CYFRAME);  
	rtTitle.right = rtWnd.right - rtWnd.left - GetSystemMetrics(SM_CXFRAME);
	rtTitle.bottom = rtTitle.top + GetSystemMetrics(SM_CYSIZE);

	CPoint point;
	//填充頂部框架
	point.x = rtWnd.Width();						
	point.y = GetSystemMetrics(SM_CYSIZE) + GetSystemMetrics(SM_CYFRAME) + 0;
	pDC->Rectangle(0, 0, point.x, point.y);
	//填充左側框架
	point.x = GetSystemMetrics(SM_CXFRAME) -1;
	point.y = rtWnd.Height()- 1;
	pDC->Rectangle(0, 0, point.x, point.y);
	//填充底部框架
	point.x = rtWnd.Width(); 
	point.y = GetSystemMetrics(SM_CYFRAME);
	pDC->Rectangle(0, rtWnd.Height()-point.y, point.x, point.y);
	//填充右側框架
	point.x = GetSystemMetrics(SM_CXFRAME);
	point.y = rtWnd.Height();
	pDC->Rectangle(rtWnd.Width()-point.x, 0, point.x, point.y);	
}