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Windows Media Player 11 SDK IWMPMediaPluginRegistrar::WMPUnRegisterPlayerPlugin 

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IWMPMediaPluginRegistrar::WMPUnRegisterPlayerPlugin

The IWMPMediaPluginRegistrar::WMPUnRegisterPlayerPlugin function removes information from the registry about a Windows Media Player plug-in.

Syntax

  HRESULT WMPUnRegisterPlayerPlugin(
  GUID  guidPluginType,
  CLSID  clsid
);

Parameters

guidPluginType

GUID specifying plug-in type. For DSP plug-ins, specify WMP_PLUGINTYPE_DSP to register for DirectShow playback and WMP_PLUGINTYPE_DSP_OUTOFPROC for Media Foundation playback. See Remarks.

clsid

Specifies the class ID of the plug-in being removed.

Return Values

The function returns an HRESULT.

Remarks

Implement this function in the exported DllUnRegisterServer function.

DSP plug-ins designed to work with Windows Media Player 11 must call this method twice if WMPRegisterPlayerPlugin was called twice. The first call must specify guidPluginType as WMP_PLUGINTYPE_DSP. The second call must specify guidPluginType as WMP_PLUGINTYPE_DSP_OUTOFPROC. For plug-ins designed to be backward compatible, you should avoid making the second call when installing for earlier versions of Windows Media Player. To accomplish this, check the Windows version. If the Windows operating system major version is greater than or equal to 6, you can safely remove the plug-in for Media Foundation playback.

Requirements

Version: Windows Media Player 9 Series or later.

Header: Include wmpservices.h.

Library: Use wmp.dll.

See Also

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