The handle_t keyword declares an object to be of the primitive handle type handle_t. A primitive binding handle is a data object that can be used by the application to represent the binding.
The handle_t type is one of the predefined types of the interface definition language (IDL). It can appear as a type specifier in typedef declarations, general declarations, and function declarators (as a function-return-type specifier and a parameter-type specifier). For the context in which type specifiers appear, see IDL.
In Microsoft RPC, parameters of type handle_t can occur only as in parameters. Primitive handles cannot have the unique or ptr attribute.
Parameters of type handle_t (primitive handle parameters) are not transmitted on the network.