// its display.
    HRESULT SubpictureStreamChange
    ( [in]  ULONG   ulSubPicture,
      [in]  BOOL    bDisplay
    );      

    // AngleChange
    // Changes the current angle number.
    HRESULT AngleChange
    ( [in]  ULONG   ulAngle
    );      

    // ParentalLevelSelect
    // Selects the current player parental level between 1 and 8.  The
    // defined parental levels are listed below :
    //
    //      Level   Rating  
    //      -----   ------  
    //
    //      1       G       
    //      3       PG      
    //      4       PG13    
    //      6       R       
    //      7       NC17    
    // Higher levels can play lower level content; lower levels cannot play 
    // higher level content.  The DVD Navigator provides no restriction on
    // setting the parental level.  DVD player application may enforce 
    // restriction on parental level setting, such as password protection for 
    // raising the current parental level.  Parental Management is disabled in
    // the Navigator by default.
    //
    //      Note : To disable parental management, pass 0xffffffff for ulParentalLevel
    //                 If parental management is disabled, then the player will play the
    //                 first PGC in a parental block regardless of parental IDs.
    //
    HRESULT ParentalLevelSelect
    ( [in]  ULONG   ulParentalLevel  
    );      

    // ParentalCountrySelect
    // Sets the country in which to interpret the the Parental Level.
    // The country specified using the Alpha-2 code of the ISO-3166 standard,
    // with the addition of 'ZZ' 
    HRESULT ParentalCountrySelect
    ( [in]  WORD    wCountry
    );      

    // KaraokeAudioPresentationModeChange
    // Sets the Karaoke audio mode.  
    // NOTE: This and all other Karoke support is currently not implemented.
    HRESULT KaraokeAudioPresentationModeChange
    ( [in] ULONG    ulMode
    );      

    // VideoModePreferrence
    // The user can specify the preferred display mode that should
    // be used to display content. The parameter is a ULONG that has
    // one of the values defined in DVD_PREFERRED_DISPLAY_MODE
    HRESULT VideoModePreferrence
    ( [in]  ULONG    ulPreferredDisplayMode
    );
    
    // SetRoot
    // Sets the root directory containing the DVD-Video volume. 
    // Can only be called from the DVD Stop State (DVD_DOMAIN_Stop).
    // If the root directory is not successfully set before 
    // IMediaControl::Play is called, the first drive starting from c:
    // containing a VIDEO_TS directory in the top level directory
    // will be used as the root.
    HRESULT SetRoot
    ( [in]  LPCWSTR     pszPath
    );        

    // MouseActivate
    // This is typically called in response to a mouse click.
    // The specified point within the display window is to see if it is
    // within a current DVD button's highlight rect.  If it is, that 
    // button is first selected, then activated.  
    // NOTE: DVD Buttons do not all necessarily have highlight rects,
    // button rects can overlap, and button rects do not always
    // correspond to the visual representation of DVD buttons.
    HRESULT MouseActivate       // typically called after a mouse click
    ( [in]  POINT       point
    );

    // MouseSelect
    // This is typically called in response to a mouse move within the 
    // display window.
    // The specified point within the display window is to see if it is
    // within a current DVD button's highlight rect.  If it is, that 
    // button is selected.
    // NOTE: DVD Buttons do not all necessarily have highlight rects,
    // button rects can overlap, and button rects do not always
    // correspond to the visual representation of DVD buttons.
    HRESULT MouseSelect         // typically called after a mouse move
    ( [in]  POINT       point
    );
    
    // ChapterPlayAutoStop
    // Start playing at the specified chapter within the specified title
    // and play the number of chapters specified by the third parameter.
    // Chapters range from 1 to 999.
    HRESULT ChapterPlayAutoStop
    ( [in] ULONG ulTitle,           // title number
      [in] ULONG ulChapter,         // chapter number to start playback
      [in] ULONG ulChaptersToPlay   // number of chapters to play from the start chapter
    );
}



//==========================================================================
//==========================================================================
// IDvdInfo interface -- allow an app to query for attributes of available 
// DVD titles and DVD player status.  Also allow for control of a DVD 
// player beyond Annex J in the DVD spec.
//==========================================================================
//==========================================================================

[
object,
uuid(A70EFE60-E2A3-11d0-A9BE-00AA0061BE93),
pointer_default(unique)
]

interface IDvdInfo : IUnknown {
    import "unknwn.idl";

    // GetCurrentDomain
    // Returns the current DVD Domain of the DVD player.
    HRESULT GetCurrentDomain
    ( [out] DVD_DOMAIN *pDomain 
    );

    // GetCurrentLocation
    // Returns information sufficient to restart playback of a video
    // from the current playback location in titles that don't explicitly
    // disable seeking to the current location.
    HRESULT GetCurrentLocation
    ( [out] DVD_PLAYBACK_LOCATION *pLocation
    );

    // GetTotalTitleTime
    // Return the total playback time for the current title.  Only works
    // for One_Sequential_PGC_Titles.
    HRESULT GetTotalTitleTime
    ( [out] ULONG * pulTotalTime // use DVD_TIMECODE.
    );

    // GetCurrentButton
    // Indicates the number of currently available buttons and the current
    // selected button number. If buttons are not present it returns 0 for
    // both pulButtonsAvailable and pulCurrentButton
    HRESULT GetCurrentButton
    ( [out] ULONG *    pulButtonsAvailable,
      [out] ULONG *    pulCurrentButton
    );

    // GetCurrentAngle
    // Indicates the number of currently available angles and the current
    // selected angle number.  If *pnAnglesAvailable==1, then the current
    // video is not multiangle.
    HRESULT GetCurrentAngle
    ( [out] ULONG *    pulAnglesAvailable,
      [out] ULONG *    pulCurrentAngle
    );

    // GetCurrentAudio
    // Indicates the number of currently available audio streams and 
    // the current selected audio stream number.
    // This only work when in DVD_DOMAIN_Title.
    HRESULT GetCurrentAudio
    ( [out] ULONG *    pulStreamsAvailable,
      [out] ULONG *    pulCurrentStream
    );

    // GetCurrentSubpicture
    // Indicates the number of currently available subpicture streams,
    // the current selected subpicture stream number, and if the 
    // subpicture display is currently disabled.  Subpicture streams 
    // authored as Forcedly Activated stream will be displayed even if
    // subpicture display has been disabled by the app with 
    // IDVDControl::SubpictureChangeStream.
    // This only work when in DVD_DOMAIN_Title.
    HRESULT GetCurrentSubpicture
    ( [out] ULONG *    pulStreamsAvailable,
      [out] ULONG *    pulCurrentStream,
      [out] BOOL *     pIsDisabled
    );

    // GetCurrentUOPS
    // Indicates which IDVDControl methods are currently valid.  DVD titles
    // can enable or disable individual user operations at almost any point 
    // during playback.
    HRESULT GetCurrentUOPS  
    ( [out] VALID_UOP_SOMTHING_OR_OTHER *    pUOP
    );

    // GetAllSPRMs
    // Returns the current contents of all System Parameter Registers.
    // See DVD-Video spec for use of individual registers.
    HRESULT GetAllSPRMs
    ( [out] SPRMARRAY * pRegisterArray
    );

    // GetAllGPRMs
    // Returns the current contents of all General Parameter Registers.
    // Use of GPRMs is title specific. 
    HRESULT GetAllGPRMs
    ( [out] GPRMARRAY * pRegisterArray
    );

    // GetAudioLanguage
    // Returns the language of the specified stream within the current
    // title.  Does not return languages for menus.  Sets *pLanguage=0 if
    // if the stream does not include language.
    // Use GetLocaleInfo(*pLanguage, LOCALE_SENGLANGUAGE, pszString, cbSize)
    // to create a human readable string name from the result LCID.
    HRESULT GetAudioLanguage
    ( [in]  ULONG        ulStream, 
      [out] LCID *       pLanguage
    );

    // GetSubpictureLanguage
    // Returns the language of the specified stream within the current
    // title.  Does not return languages for menus.  Sets *pLanguage=0 if
    // if the stream does not include language.
    // Use GetLocaleInfo(*pLanguage, LOCALE_SENGLANGUAGE, pszString, cbSize)
    // to create a human readable string name from the result LCID.
    HRESULT GetSubpictureLanguage
    ( [in]  ULONG        ulStream, 
      [out] LCID *       pLanguage
    );

    // GetTitleAttributes
    // Returns attributes of all video, audio, and subpicture 
    // streams for the specified title including menus.  
    // If nTitle == 0xffffffff, attributes for the current title are returned.
    HRESULT GetTitleAttributes
    ( [in]  ULONG       ulTitle, // requested title number
      [out] DVD_ATR *   pATR 
    );

    // GetVMGAttributes
    // Returns attributes of all video, audio, and subpicture 
    // streams for Video Manager Menus.  Some menus, such as the DVD_MENU_Title
    // are in a separate group of streams called the VMG (Video Manager) and
    // are not associated with any particular title number.
    HRESULT GetVMGAttributes
    ( [out] DVD_ATR *   pATR 
    );

    // GetCurrentVideoAttributes
    // Returns the video attributes for the current title or menu.
    HRESULT GetCurrentVideoAttributes
    ( [out] DVD_VideoATR *pATR 
    );

    // GetCurrentAudioAttributes
    // Returns the video attributes for the stream in the current 
    // title or menu.
    HRESULT GetCurrentAudioAttributes
    ( [out] DVD_AudioATR *pATR 
    );

    // GetCurrentSubpictureAttributes
    // Returns the video attributes for the stream in the current 
    // title or menu.
    HRESULT GetCurrentSubpictureAttributes
    ( [out] DVD_SubpictureATR *pATR 
    );


    // GetCurrentVolumeInfo
    // Returns current DVD volume info.
    HRESULT GetCurrentVolumeInfo
    ( [out] ULONG *pulNumOfVol,   // number of volumes (disc sides?) in a volume set
      [out] ULONG *pulThisVolNum, // volume number for this root directory
      [out] DVD_DISC_SIDE *pSide, // current disc side
      [out] ULONG *pulNumOfTitles // number of titles available in this volume
    );


    // GetDVDTextInfo
    // Returns the TXTDT_MG structure, which can contain text descriptions for title
    // name, volume name, producer name, vocalist name, etc. in various languages.
    // refer to Section 4.1.6 and Annex A of the DVD-Video spec.
    // If the buffer size passed in is insufficient (for example if cbBufSize==0),
    // then E_OUTOFMEMORY is returned, and *pcbActualSize is set to the required size.
    HRESULT GetDVDTextInfo
    ( [out, size_is(ulBufSize)] BYTE *pTextManager, 
      [in]  ULONG ulBufSize,        // buffer size passed in
      [out] ULONG *pulActualSize    // amount of actual data return
    );

    //  GetPlayerParentalLevel
    //  Returns the current parental level and the current country code
    //  that has been set in the system registers in player. 
    //  See Table 3.3.4-1 of the DVD-Video spec for the defined parental levels.
    //  Valid Parental Levels = 1..8 if parental management is enabled
    //  0xffffffff if parental management is disabled
    //  See ISO3166 : Alpha-2 Code for the country codes.
    HRESULT GetPlayerParentalLevel
    ( [out] ULONG *pulParentalLevel,    // current parental level
      [out] ULONG *pulCountryCode       // current country code
    );
    
    //  GetNumberOfChapters
    //  Returns the number of chapters that are defined for a
    //  given title.
    HRESULT GetNumberOfChapters
    ( [in]  ULONG ulTitle,              // Title for which number of chapters is requested
      [out] ULONG *pulNumberOfChapters    // Number of chapters for the specified title
    );

    // GetTitleParentalLevels
    // Returns the parental levels that are defined for a
    // particular title. pParentalLevels will be combination
    // of DVD_PARENTAL_LEVEL_8, DVD_PARENTAL_LEVEL_6, or 
    // DVD_PARENTAL_LEVEL_1 "OR"ed together
    HRESULT GetTitleParentalLevels
    ( [in] ULONG ulTitle,           // Title for which parental levels are requested
      [out] ULONG *pulParentalLevels  // Parental levels defined for the title "OR"ed together
    );

    // GetRoot
    // Returns the root directory that is set in the player. If a valid root
    // has been found, it returns the root string. Otherwise, it returns 0 for
    // pcbActualSize indicating that a valid root directory has not been found
    // or initialized.
    //
    // !!! used to return LPTSTR. interface was changed to return
    // LPSTR (ansi) for compatibility. COM APIs should pass with
    // UNICODE strings only.
    // 
    HRESULT GetRoot