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Specifies the type of protection mechanism used in an Advanced Systems Format (ASF) file.
Data type
Wide-character string
Remarks
This attribute applies to presentation descriptors for ASF content.
The IMFASFContentInfo::GeneratePresentationDescriptor method retrieves the Protection Type field, converts it into a wide-character string, and then populates a null-terminated array of WCHARs. If present, the value must be "DRM". The size of the array equals the Protection Type Field Length field of the Content Encryption Header.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2008 [desktop apps only] |
| Header |
|
See also