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Windows Media Player 11 SDK Listening Attributes 

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Listening Attributes

A listening attribute is used to connect one attribute to another so that its value changes every time the value of the other attribute changes.

The listening attribute wmpprop: is the most useful. If the value of one attribute is specified to be the wmpprop: of a second attribute, the first value will be automatically updated to reflect the second value each time the second value changes.

Example:

In this way, the value of mySlider, shown by the position of the slider control, can also be shown as a number within a text box.

The two other listening attributes, wmpenabled: and wmpdisabled:, can be used to change the enabled attribute of a control depending on whether its functionality is currently available in the player. These attributes can listen only to methods of the Controls object.

Example:

See Also

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