The GUID for the COM Class (CoClass) corresponding to the class extension for this object class.
[Visual Basic 6.0] Property EXTCLSID As IUID
[Visual Basic .NET] Public ReadOnly Property EXTCLSID As UID
[C#] public UID EXTCLSID {get;}
[Java] public IUID getEXTCLSID() throws IOException, AutomationException
[C++] HRESULT get_EXTCLSID( IUID** ClassExtensionCLSID );
Parameters
ClassExtensionCLSID [out, retval]
ClassExtensionCLSID is a parameter of type IUID