EC_WMT_EVENT
| Microsoft DirectShow 9.0 |
EC_WMT_EVENT
Sent by the WM ASF Reader filter when it reads ASF files protected by digital rights management (DRM).
Parameters
lParam1
One of the following WMT_STATUS values:
| Value | Description |
| WMT_ACQUIRE_LICENSE | Sent when the DRM component has completed the license acquisition process, either successfully or unsuccessfully. |
| WMT_INDIVIDUALIZE | The security upgrade process has completed, either successfully or unsuccessfully. |
| WMT_NEEDS_INDIVIDUALIZATION | The file requires that an application receive a security upgrade before performing the requested action. |
| WMT_NO_RIGHTS | The application has no rights to perform he requested action on a file protected by DRM version 1. |
| WMT_NO_RIGHTS_EX | The application has no rights to perform he requested action on a file protected by DRM version 7. |
lParam2
Pointer to an AM_WMT_EVENT_DATA structure that contains information about the event, or NULL. 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_ACQUIRE_LICENSE | Pointer to a WM_GET_LICENSE_DATA structure. This structure is documented in the Windows Media Format SDK. |
| WMT_INDIVIDUALIZE | Pointer to a WM_INDIVIDUALIZE_STATUS structure. |
| WMT_NEEDS_INDIVIDUALIZATION | NULL. |
| WMT_NO_RIGHTS | Pointer to a wide-character string containing a challenge URL. |
| WMT_NO_RIGHTS_EX | Pointer to a WM_GET_LICENSE_DATA structure. |
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.
Requirements
Header: Dshow.h.
See Also