MIDL2068
The documentation lists this name without a value.
Documented in Win32
specifying [context_handle] on a type other than void * requires /ms_ext For DCE-RPC compatibility, the context handle must be a pointer of type void * . If you want the context handles to be associated with types other than void * , do not use the MIDL compiler switch /osf , which overrides the MIDL compiler default switch /ms_ext .