MIDL2193
The documentation lists this name without a value.
Documented in Win32
[handle] must not be specified on a type deriving from handle_t A handle type must be defined using one and only one of the handle types or attributes. Use the primitive type handle_t or the attribute [ handle ], but not both. The user-defined handle type must be transmissible, but the handle_t type is not transmitted on the network.