Returns the index identifying the specified adapter on the Parallels Service.
PRL_RESULT PrlDispNet_GetIndex( PRL_HANDLE hDispNet, PRL_UINT32_PTR pnIndex );
PrlApiDeprecated.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.