Re: MFC serialization of HICON

"Mark Salsbery [MVP]" <MarkSalsbery[MVP]@newsgroup.nospam>
Thu, 7 Feb 2008 12:40:05 -0800
"Pawel Kozielski" <> wrote in


my sincere apologies.
You are completely right, "serialize_ex.cpp" is not a part of MFC.
I just realize that it was implemented internally.

Following are overloads for HICON and HBITMAP (HBITMAP used by HICON
overload for mask and color bmps)

// Archiving Bitmaps

CArchive& operator<<(CArchive &ar, const HBITMAP &hBitmap)
Bitmap bm(hBitmap,NULL);

// Get the class identifier for the PNG encoder.
CLSID pngClsid;
GetEncoderClsid(L"image/png", pngClsid);

//The CStream object will contain the Bitmap data
CStream bmStream(100*1000);


return ar;

CArchive& operator>>(CArchive &ar, HBITMAP &hBitmap)
CStream bmStream;

Bitmap bm(&bmStream);
Status sResult = bm.GetLastStatus();
if( sResult != Ok )

hBitmap = NULL;
sResult = bm.GetHBITMAP(Color::Black,(HBITMAP*)&hBitmap);
if( sResult != Ok )

return ar;

// Archiving Icons

CArchive& operator<<(CArchive &ar, const HICON &hIcon)

BOOL bResult = ::GetIconInfo(hIcon,&info);
if( !bResult )
DWORD dwError = ::GetLastError();
CString s;
s.Format(_T("Error: %d\n"),dwError);


ar << info.fIcon;
   ar << info.xHotspot;
   ar << info.yHotspot;
   ar << info.hbmMask;
   ar << info.hbmColor;

return ar;

CArchive& operator>>(CArchive &ar, HICON &hIcon)
ar >> info.fIcon;
ar >> info.xHotspot;
ar >> info.yHotspot;
ar >> info.hbmMask;
ar >> info.hbmColor;

hIcon = ::CreateIconIndirect(&info);
if( hIcon == NULL )
DWORD dwError = GetLastError();
CString s;
s.Format(_T("Error: %d\n"),dwError);



return ar;

Storing seems to work but when loading, Bitmap bm(&bmStream) crashes.
Bitmap constructor is called in "GdiPlusBitmap.h"
(Bitmap::Bitmap(IN IStream *stream, IN BOOL useEmbeddedColorManagement)
DllExports::GdipCreateBitmapFromStream(stream, &bitmap); throws but i can
step in farther.

What makes me uneasy is that all of that code worked before i upgraded to
2008. I was using 2005 before.

hmm I don't see anything in the code right off hand...

Nothing should have changed as far as Windows APIs including GDI+...

So what about the CStream class? How is that implemented?


Mark Salsbery
Microsoft MVP - Visual C++

Thank you again for looking into my issue.

Pawel Kozielski

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