INULL.H

//==========================================================================; 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY 
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR 
//  PURPOSE. 
// 
//  Copyright (c) 1992 - 1997  Microsoft Corporation.  All Rights Reserved. 
// 
//--------------------------------------------------------------------------; 
//---------------------------------------------------------------------------- 
// iNull.h 
//---------------------------------------------------------------------------- 
 
// A custom interface to allow the user select media types 
 
#ifndef __INULLIP__ 
#define __INULLIP__ 
 
#ifdef __cplusplus 
extern "C" { 
#endif 
 
 
//---------------------------------------------------------------------------- 
// INullIP's GUID 
// 
// {43D849C0-2FE8-11cf-BCB1-444553540000} 
DEFINE_GUID(IID_INullIPP, 
0x43d849c0, 0x2fe8, 0x11cf, 0xbc, 0xb1, 0x44, 0x45, 0x53, 0x54, 0x00, 0x00); 
//---------------------------------------------------------------------------- 
 
//---------------------------------------------------------------------------- 
// INullIPP 
//---------------------------------------------------------------------------- 
DECLARE_INTERFACE_(INullIPP, IUnknown) 
{ 
 
    STDMETHOD(put_MediaType) (THIS_ 
      CMediaType *pmt       /* [in] */// the media type selected 
 ) PURE; 
 
    STDMETHOD(get_MediaType) (THIS_ 
      CMediaType **pmt      /* [out] */// the media type selected 
 ) PURE; 
 
    STDMETHOD(get_IPin) (THIS_ 
      IPin **pPin          /* [out] */// the source pin 
 ) PURE; 
 
 
    STDMETHOD(get_State) (THIS_ 
      FILTER_STATE *state  /* [out] */// the filter state 
 ) PURE; 
 
 
}; 
//---------------------------------------------------------------------------- 
 
#ifdef __cplusplus 
} 
#endif 
 
#endif // __INULLIP__