HRESULT Invoke( DISPID dispidMember, REFIID riid, LCID lcid, WORD wFlags, DISPPARMS* pdispparams, VARIANT* pvarResult, EXCEPINFO* pexcepinfo, UINT* puArgErr );
See IDispatch::Invoke in the Win32 SDK.
Remarks
Provides access to the methods and properties exposed by the dual interface.