Do I need RpcEpRegister() for well-known endpoints?

Question

Our native Win32 C++ RPC server application doesn't use RpcEpRegister(), instead it calls

• RpcServerUseProtseqEp(), then
• RpcServerRegisterIf(), then
• RpcServerListen()

and that stuff works except for minor problems we still can't solve. I've thoroughly read MSDN and still don't get whether using this function is necessary.

What exactly is the purpose of RpcEpRegister() (I ask because our stuff works without it most of time), do we need to use it and how should we do it?