3.2.4.21 RRouterInterfaceEnum (Opnum 20)
If the return code is ERROR_MORE_DATA (0x000000EA), then the call RRouterInterfaceEnum (section 3.1.4.21) with the handle passed in lpdwResumeHandle. If lpdwResumeHandle is NULL, the enumeration cannot be continued.
If the method completes successfully and returns a value of either ERROR_MORE_DATA or ERROR_SUCCESS (0x00000000), the client MUST free the returned buffer pInfoStruct.