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WM/ProtectionType Attribute

[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The WM/ProtectionType attribute is the type of protection used on the content.

Applies To


This attribute is stored in both the library and the digital media file.

ProtectionType is an alias for this attribute.

The Windows Media Format SDK constant for this attribute is g_wszWMProtectionType.

To determine whether you can change the value of this attribute, use the Media.isReadOnlyItem method.


Requirement Value
Windows Media Player 9 Series or later

See also

Attribute Reference