Microsoft DirectX 9.0

EC_WMT_EVENT

This event is sent when an application uses the ASF Reader filter to play ASF files protected by digital rights management (DRM).

Parameters

lParam1

Can be one of the following WMT_STATUS values:

WMT_STATUS Message Description
WMT_NO_RIGHTS The application has no rights to perform he requested action on a file protected by DRM version 1.
WMT_ACQUIRE_LICENSE Sent when the DRM component has completed the license acquisition process, either successfully or unsuccessfully.
WMT_NO_RIGHTS_EX The application has no rights to perform he requested action on a file protected by DRM version 7.
WMT_NEEDS_INDIVIDUALIZATION The file requires that an application receive a security upgrade before performing the requested action.
WMT_INDIVIDUALIZE The security upgrade process has completed, either successfully or unsuccessfully.

lParam2

Optional pointer to an AM_WMT_EVENT_DATA structure that contains information about the event. The pData member of this structure points to additional data, whose type depends on the value of lParam1, as shown in the following table.

lParam1 AM_WMT_EVENT_DATA.pData
WMT_NO_RIGHTS Pointer to a wide-character string containing a challenge URL.
WMT_ACQUIRE_LICENSE Pointer to a WM_GET_LICENSE_DATA structure (defined in the Windows Media Format SDK).
WMT_NO_RIGHTS_EX Pointer to a WM_GET_LICENSE_DATA structure (defined in the Windows Media Format SDK).
WMT_NEEDS_INDIVIDUALIZATION NULL.
WMT_INDIVIDUALIZE Pointer to a WM_INDIVIDUALIZE_STATUS structure (defined in the Windows Media Format SDK).

The value of lParam2 might be NULL. Check the value before dereferencing the pointer.

Remarks

See the Windows Media Format SDK documentation for more information on enabling playback of DRM-protected files.

See Also