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Using Custom Parameters and Commands

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[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 It has been superseded by MediaPlayer.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.]

You can create custom parameters to pass additional metadata in a metafile playlist by using the PARAM element. Use the NAME attribute of the PARAM element to define the custom parameter name. Use the VALUE attribute to define the value for the named custom parameter.

Retrieve PARAM metadata by using the getItemInfo methods of the Media and Playlist objects. For an example using these methods to retrieve metadata, see the attributeCount method of the Playlist object.

The following example metafile playlist shows the use of the PARAM element to define custom parameters.

<ASX version="3.0" BANNERBAR="auto" >
    <TITLE>Example Media Player Show</TITLE>
    <PARAM NAME="Director" VALUE="Jane D." />

    <ENTRY>
        <TITLE>Example Clip</TITLE>
        <REF HREF="https://www.proseware.com/media.wma" />
        <PARAM NAME="Title" VALUE="Example Clip" />
        <PARAM NAME="Location" VALUE="North America" />
        <PARAM NAME="Release Date" VALUE="March 1998" />
    </ENTRY>

    <ENTRY>
        <TITLE>Another Clip</TITLE>
        <REF HREF="https://www.proseware.com/more_media.wma" />
        <PARAM NAME="Title" VALUE="Another Clip" />
        <PARAM NAME="Location" VALUE="Japan" />
        <PARAM NAME="Release Date" VALUE="December 2000" />
    </ENTRY>
</ASX>

Using Metafile Playlists