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IDvdInfo::GetCurrentButton method (strmif.h)

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[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Note  The IDvdInfo interface is deprecated. Use IDvdInfo2 instead.
 
Retrieves the number of available buttons and the currently selected button number.

Syntax

HRESULT GetCurrentButton(
  [out] ULONG *pulButtonsAvailable,
  [out] ULONG *pulCurrentButton
);

Parameters

[out] pulButtonsAvailable

Pointer to the number of buttons available.

[out] pulCurrentButton

Pointer to the number of the current button.

Return value

Returns an HRESULT value .

Return code Description
S_OK
 Success.
VFW_E_DVD_OPERATION_INHIBITED
 Requested action cannot occur at this point in the movie due to the authoring of the current DVD-Video disc.

Remarks

If buttons are not present this method returns zero for both pnButtonsAvailable and pnCurrentButton.

This method is valid in any domain. For more information, see DVD_DOMAIN.

Requirements

Requirement Value
Target Platform Windows
Header strmif.h (include Dshow.h)

See also

Error and Success Codes

IDvdInfo Interface