通过

CWindow::BeginPaint

  • 项目

Prepares the window for painting.

HDC BeginPaint( 
   LPPAINTSTRUCT lpPaint  
) throw();

Remarks

See BeginPaint in the Windows SDK.

Example

//The following example attaches an HWND to the CWindow object 
//and calls CWindow::BeginPaint() and CWindow::EndPaint() in the  
// WM_PAINT handler of a CWindowImpl-derived class
LRESULT CMyCtrl::OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, 
   BOOL& /*bHandled*/)
{
   CWindow myWindow;
   myWindow.Attach(m_hWnd);
   PAINTSTRUCT ps;
   HDC hDC  = myWindow.BeginPaint(&ps);
   //Use the hDC as much as you want
   ::Rectangle(hDC, 0, 0, 50, 50);

   myWindow.EndPaint(&ps);

   return 0;
}

Requirements

Header: atlwin.h

See Also

Reference

CWindow Class

CWindow::EndPaint