Re: CPictureHolder OleLoadPicture

From:

"Tom Serface" <tom.nospam@camaswood.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 16 Mar 2007 16:24:43 -0700

Message-ID:

<D6EB899D-3ADF-4716-A091-2DB082B80C39@microsoft.com>

This code uses that same paradigm:

http://msdn.microsoft.com/msdnmag/issues/01/10/c/

Tom

<dom_perron@hotmail.com> wrote in message
news:1174078078.221705.10260@d57g2000hsg.googlegroups.com...

Hi,

I tried several different manners to post a bitmap in CPictureHolder
of a activex MFC without succes. The method that I try to use at
present is with the OleLoadPicture method. Here is my code:

//*****************************************************************
CPictureHolder m_pic;

//This string is here for my tests but I will obtain it from an XML
string because the bitmap images are
//serialized into XML in C#
strBinImage =
"R0lGODlhOQAwAPUAAAAAAKBggOCgwIAAAMBggMDAwKBAAMCggKDAwMCgwEBAgKCgpP/
78KBAQGCggGBAgAAAAABAgKbK8MDAgMBAAKBgAKDAgAAAQGBggGBAQAAAgEAAQMDcwMBAQKCgwGAAQEBggKBgQKCggMAgAEBAQMBgAEAAgGCgwKBAgGBgQKAAQMBgQOBAAEBgQOCgAP8AAODAAGBgAMDAAMCgAGBAAKCgAEBgAMDgAEBAAMAAQEAgA[...]";

std::string str = strBinImage.GetString();

//Decode the image string
BYTE * pBytes = Base64Decoder::Decode(str ,
(Base64Decoder::Buffer)result );
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE , result.size());

RtlMoveMemory(pBytes, GlobalLock(hGlobal), result.size());
IStream *pIStrm;
// Create ISTREAM
CreateStreamOnHGlobal(hGlobal, TRUE, &pIStrm);

//Seek to the begin
LARGE_INTEGER lInt;
lInt.QuadPart = 0;
HRESULT hr = pIStrm->Seek(lInt, STREAM_SEEK_SET, NULL);

hr = OleLoadPicture(pIStrm, result.size(), FALSE, IID_IPicture,
(LPVOID*)&m_pic.m_pPict);

m_pic.Render(pdc, rcBounds, rcBounds);

//*****************************************************************

The problem is that the OleLoadPicture return that my image is invalid
and the image do not appears in my activex control...

Is anyone has any idea?

Thanks a lot

Dominique