Re: CBitmap to IPIcture.... How?

You may try this MFC code I developed (I tested it and seems OK)

<code>
void CTestBitmapPicDlg::OnBnClickedSave()
{
    // Load a bitmap
    CBitmap bmp;
    VERIFY( bmp.LoadBitmap( IDB_CAT ) );

    // Result
    HRESULT hr;

    //
    // Create the IPicture from the bitmap handle
    //
    IPicture * pPicture = NULL;
    PICTDESC pictureDesc;
    ::ZeroMemory( &pictureDesc, sizeof(pictureDesc) );
    pictureDesc.cbSizeofstruct = sizeof(pictureDesc);
    pictureDesc.picType = PICTYPE_BITMAP;
    pictureDesc.bmp.hbitmap = static_cast<HBITMAP>( bmp );

    hr = ::OleCreatePictureIndirect( &pictureDesc, IID_IPicture, FALSE,
reinterpret_cast<void **>(&pPicture) );
    if ( FAILED(hr) )
    {
        AfxMessageBox( _T("Error in creating picture from bitmap.") );
        return;
    }

    //
    // Create an output stream (file) to write the bitmap
    //
    IStream * pStream = NULL;
    CString filename( _T("MyCat.bmp") );
    if ( FAILED( SHCreateStreamOnFile(
        filename,
        STGM_WRITE | STGM_SHARE_DENY_WRITE | STGM_CREATE | STGM_DIRECT,
        &pStream ) ) )
    {
        AfxMessageBox( _T("Error in creating file stream.") );

        pPicture->Release();
        pPicture = NULL;

        return;
    }

    // Save to file
    if (FAILED( pPicture->SaveAsFile( pStream, TRUE, NULL ) ) )
    {
        pStream->Release();
        pStream = NULL;

        pPicture->Release();
        pPicture = NULL;
    }

    //
    // Object cleanup
    //

    pStream->Release();
    pStream = NULL;

    pPicture->Release();
    pPicture = NULL;

    AfxMessageBox( _T("Bitmap saved to file.") );
}
</code>

Note that using ATL COM smart pointers, you can make your cleanup code
easier.

Giovanni

"Jessica" <Jessica@discussions.microsoft.com> ha scritto nel messaggio
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