BUG: Exception in Windows Media Player When You Use Source Plug-In with WMCreateStreamForURL (320630)

SYMPTOMS

A Windows Media source plug-in is a DLL file that developers can use to provide their own storage system for Windows Media files. A source plug-in makes this possible through the implementation of a COM interface that is called an IStream. An IStream is a standard interface for providing data, and is passed to the Windows Media Format SDK from the WMCreateStreamForURL function call. When you use the Windows Media Format SDK in any program that uses the Windows Media Format SDK (such as Microsoft Windows Media Player) to play streams that are accessed through your source plug-in, you may experience the following symptoms:

• The playback may stop.
• You may receive the following error message:
  Unhandled exception in wmplayer.exe (wmvcore.dll):0xc0000005: access violation.

HMODULE hModLib;
HRESULT WINAPI WMCreateStreamForURL( 
                /* [in] */  LPCWSTR pwszURL,
                /* [out] */ BOOL *pfCorrectSource,
                /* [out] */ IStream **ppStream )
{
    // if pwszURL is something my source plug-in can handle...
    *pfCorrectSource = TRUE;
    hModLib =  LoadLibrary("source.dll");
    //source.dll is the DLL that implements the source plug-in
    //Rest of the implementation 
    //...
    //...
    //...
}