ltmmWMScript Object

The ltmmWMScript object exposes a Windows Media script management interface, useful for adding and removing script commands in the WMV video format. The ltmmCapture and ltmmConvert objects use this interface to allow the insertion of header and stream-based scripts. An ltmmWMScript object cannot be created externally and is only obtained through the parent object’s interface.  To get this interface, call either IltmmCapture::GetSubObject or IltmmConvert::GetSubObject, passing either ltmmCapture_Object_TargetFilter or ltmmConvert_Object_TargetFilter, respectively.

See the Microsoft documentation, Using Script Commands Supported by Windows Media Player, for a complete list of script commands supported by Windows Media Player.