WM/WMCollectionID
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The WM/WMCollectionID attribute contains a GUID identifying the collection.
Global Constant
g_wszWMWMCollectionID
Data Type
WMT_TYPE_GUID
Remarks
Content is identified by Windows Media technologies by using three values: WM/WMCollectionGroupID, WM/WMCollectionID, and WM/WMContentID. These values identify the content, the collection to which it belongs, and the group to which the collection belongs. All three of these values are populated by Windows Media Player when metadata for the content is retrieved. You can have your application record these values and use them to identify content, but you should not change them if they are present.
See also
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