一、利用WinSDK划线 (Copy Code) HDC hdc; hdc = ::GetDC( m_hWnd ); MoveToEx( hdc, m_starpoint.x, m_starpoint.y, NULL ); LineTo( hdc, point.x, point.y ); ::ReleaseDC( m_hWnd, hdc ); 二、利用MFC中的类CDC划线 (Copy Code) CDC *pDc = GetDC(); pDc->MoveTo( m_starpoint ); pDc->LineTo( point ); ReleaseDC( pDc ); 三、利用类CClientDC划线 (Copy Code) CClientDC dc( this ); dc.MoveTo( m_starpoint ); dc.LineTo( point );