ファイルからピクチャオブジェクト(IPicture)を作成

#include <comdef.h>

#include <shlwapi.h>

#pragma comment(lib, "shlwapi.lib")

HRESULT OleLoadPictureFromFile(TCHAR* szFileName, IPicturePtr& spPicture)

{

    HRESULT hr = S_OK;

    try

    {

        IStreamPtr spStream;

        DWORD grfMode = STGM_READ | STGM_SHARE_DENY_WRITE;

#if 1

        hr = ::SHCreateStreamOnFile(szFileName, grfMode, &spStream);

#else // NO_SHLWAPI_STREAM

        // IE5.0以下でSHLWAPIが使用できない場合

        hr = ::_SHCreateStreamOnFile(szFileName, grfMode, &spStream);

#endif

        if (FAILED(hr))

        {

            return hr;

        }

        hr = ::OleLoadPicture(spStream, 0, FALSE, IID_IPicture, (void**)&spPicture);

        if (FAILED(hr))

        {

            return hr;

        }

    }

    catch (...)

    {

        return E_FAIL;

    }

    return hr;

}