.85%29.aspx">public
    					API</a> for introducing Markers into a WMV file, as part of the Windows
    					Media Format SDK. Using Expression Encoder is the way that the task
    					of directly embedding TimelineMarkers is presented
    					and taught in Microsoft's available instructional material on Silverlight.
    					However, because the mechanism is public, it is possible that other
    					tools exist or will exist that can also produce media with script-encoded TimelineMarkers. </p>
      
 