WTL对话框中添加背景图

1、添加消息映射
  MESSAGE_HANDLER(WM_PAINT, OnPaint)

2、初始化gdi+

#include <GdiPlus.h>
using namespace Gdiplus;
#pragma  comment(lib, "GdiPlus.lib")

GdiplusStartupInput in;
 GdiplusStartup(&token, &in, NULL);

 

LRESULT OnPaint(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/)
  {
   CPaintDC dc(m_hWnd);
   CRect rect;
   GetClientRect(&rect);
 
   HDC hDC = dc.GetSafeHdc();

   Graphics g(hdc);
    Image im(L"img/btn.png");
    g.DrawImage(&im, 0, 0, rect.Width(), rect.Height());

     return 0;
  }