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About IWMPPluginEnable
The IWMPPluginEnable interface is required for Windows Media Player DSP plug-ins. IWMPPluginEnable contains two methods that store whether Windows Media Player has enabled the DSP plug-in. Windows Media Player calls IWMPPluginEnable::SetEnable when it creates an instance of the DSP plug-in, passing a value of TRUE if it has enabled the plug-in or FALSE otherwise.
DSP plug-ins may remain loaded even when the user chooses to disable them. When disabled, a plug-in must copy data from the input buffer to the output buffer, performing only format conversion processing, if applicable.
Windows Media Player also calls this method before it releases an instance of the DSP plug-in. This is useful to allow clients of the plug-in to check whether the plug-in is currently enabled. For instance, a user interface plug-in might change the appearance of its controls to alert the user that the DSP plug-in is not connected.
See Also
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