Obtaining an Encoding Identity
An application that is decoding encoded data can obtain the identity of the routine used to encode the data, prior to calling a routine to decode it. The MesInqProcEncodingId routine provides this identity.
Each procedure in an interface is assigned an integer identification number, called a procedure identifier or a proc ID, by the MIDL compiler. Numbering begins with zero. The RPC run-time libraries are not involved in translating the procedure ID into an actual procedure call. Given a proc ID, your application must provide a means of calling the correct procedure. Typically, application developers use a series of if statements, or (when using C/C++) a switch statement for this purpose.