Name Resolution Mapping Between API and SPI Functions

The installation of service classes, registration of service instances and basic query operations all map fairly directly from the API to the SPI. The WSAGetServiceClassNameByClassId function does not have a corresponding function in the SPI, as this function is implemented in Ws2_32.dll by making a call to NSPGetServiceClassInfo.

The helper functions WSAAddressToString and WSAStringToAddress are mapped to the corresponding functions in the transport API, as only a transport provider will necessarily know how to perform the translation on a SOCKADDR structure.