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IWMHeaderInfo3::DeleteAttribute method

The DeleteAttribute method removes an attribute from the file header.

Syntax


HRESULT DeleteAttribute(
  [in]  WORD wStreamNum,
  [in]  WORD wIndex
);

Parameters

wStreamNum [in]

WORD containing the stream number for which the attribute applies. Setting this value to zero indicates a file-level attribute.

wIndex [in]

WORD containing the index of the attribute to be deleted.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return codeDescription
S_OK

The method succeeded.

E_NOTIMPL

The method is not implemented on a reader object.

NS_E_INVALIDREQUEST

wStreamNum is not a valid stream number, or there is not an attribute at wIndex.

 

Remarks

You can use 0xFFFF for the stream number to specify an attribute using its global index. Global index values range from 0 to one less than the count of attributes received from a call to IWMHeaderInfo3::GetAttributeCountEx where the stream number was set to 0xFFFF.

When deleting multiple attributes, you should do so in descending order by index value. For convenience, this is the order in which index values are retrieved by IWMHeaderInfo3::GetAttributeIndices.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Version

Windows Media Format 9 Series SDK, or later versions of the SDK

Header

Wmsdkidl.h (include Wmsdk.h)

Library

Wmvcore.lib;
WMStubDRM.lib (if you use DRM)

See also

IWMHeaderInfo3 Interface

 

 

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