... GetClientRect(&rect); CClientDC dc(this); dc.MoveTo(rect.left, rect.top); dc.LineTo(rect.right, rect.bottom); dc.Ellipse(0, 0, 100, 100); hay: CRect rect; GetClientRect(&rect); CDC* pDC = GetDC(); pDC->MoveTo(rect.left, ... WS_HSCROLL ¦ WS_VSCROLL); } int CMainWindow::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CFrameWnd::OnCreate(lpCreateStruct) == -1 ) return -1 ; Trang 24 Lập trình Windows với VC/MFC CClientDC dc(this); ... pDC->GetCurrentBrush(); CBrush *pNewBrush = new CBrush(); pNewBrush->CreateSolidBrush(RGB(255, 255, 255)); CRect rect; GetClientRect(&rect); pDC->SelectObject(pNewBrush); pDC->FillRect(rect, pNewBrush); pDC->TextOut(0,...