Becasue in the first lines of the CPP file "new" is redefined.
I recall there is a KB article on it. Look for "MFC and GDI+"
Or just remove the definition.

George.
 I have started a new MFC DLL project with the " using namespace Gdiplus; "
 library and I have one routine that will compile everything except one line. The
 compiled code is:

 VOID OCRScreen(HWND ghwndApp)
 {
     BitmapData data;
     HDC   hdcSrc;
     HDC   hdcDst;
     RECT  rc;
     HBITMAP  hbm;
     int x, y;
 
     GetClientRect(ghwndApp, &rc);
     x = BOUND(gptZoom.x, gcxZoomed / 2, gcxScreenMax - (gcxZoomed / 2));
     y = BOUND(gptZoom.y, gcyZoomed / 2, gcyScreenMax - (gcyZoomed / 2));

     rc.left   = x - gcxZoomed / 2;
     rc.top    = y - gcyZoomed / 2;
     rc.right  = rc.left + gcxZoomed;
     rc.bottom = rc.top + gcyZoomed;

     InflateRect(&rc, 1, 1);
 
     if (hdcSrc = GetDC(NULL))
     {
         if (hbm = CreateCompatibleBitmap(hdcSrc,
             rc.right - rc.left, rc.bottom - rc.top))
         {
             if (hdcDst = CreateCompatibleDC(hdcSrc))
             {
                 SelectObject(hdcDst, hbm);

                 BitBlt(hdcDst, 0, 0, rc.right - rc.left, rc.bottom - rc.top,
                         hdcSrc, rc.left, rc.top, SRCCOPY);

                 /////********     bmImage1 = new Bitmap(hbm, ghpalPhysical);     ********/////

                 Rect rc(0, 0, bmImage1->GetWidth(), bmImage1->GetHeight());

                 bmImage1->LockBits(&rc, ImageLockModeWrite | ImageLockModeRead,
                                                 PixelFormat24bppRGB, &data);

                 // blah blah
                 
                 bmImage1->UnlockBits(&data);

                 delete bmImage1;

                 DeleteDC(hdcDst);
             }
             DeleteObject(hbm);
         }
   ReleaseDC(ghwndApp, hdcSrc);
     }
 }// OCRScreen

 The erroneous line of code that will not compile has been commented out and gives
 the error C2660: 'Gdiplus::GdiplusBase::operator new' : function does not take
 3 parameters. Why does Vc7 see 3 parameters as opposed to the obvious 2
 parameters ?

 Please help and TIA  ---  RS.