Query IUnknown for IDispatch interface.
retcode = %CoQueryInterface(Param1, Param2, Param3)
Param1 [in] | Dispatch object containing the IUknown interface. |
Param2 [in] | IID_IDispatch. |
Param3 [out] | Dispatch object containing the IDispatch interface. |
A Boolean (Success or Fail)
Call CoGetException to get an error description.