[Bug 47490] New: GlobalLock different behavior

https://bugs.winehq.org/show_bug.cgi?id=47490

Bug ID: 47490
           Summary: GlobalLock different behavior
           Product: Wine
           Version: 1.6.2
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel32
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Different behavior of GlobalLock in DxWnd GUI routine.
This is an extract of source code:

IStream *pStream = 0;
    CreateStreamOnHGlobal(0, TRUE, &pStream);
    LONG cbSize = 0;
    hr = pPicture->SaveAsFile(pStream, TRUE, &cbSize);
    if(FAILED(hr)) {
        OutTrace("GrayIcon: SveAsFile error hr=%#x\n", hr);
        return NULL;
    }
    HGLOBAL hBuf = 0;
    hr = GetHGlobalFromStream(pStream, &hBuf);
    if(FAILED(hr)) {
        OutTrace("GrayIcon: GetHGlobalFromStream error hr=%#x\n", hr);
        return NULL;
    }
    buf = (BYTE *)GlobalLock(hBuf);
    if(buf == NULL) {
        OutTrace("GrayIcon: GlobalLock error err=%d\n", GetLastError());
        return NULL;
    }

the stream holds an icon picture, everything is ok but the GlobalLock call:
- in Windows it returns a valid memory address
- in Wine/Linux it returns NULL errno 157 ERROR_DISCARDED - The segment is
already discarded and cannot be locked.

All this is in DxWnd program run on Wine/Linux environment.
P.s. my first bug report here - hope everything is more or less ok ... ;)