C# Definition:

    public enum KERB_PROTOCOL_MESSAGE_TYPE : uint
    {
        KerbDebugRequestMessage = 0,
        KerbQueryTicketCacheMessage = 1,
        KerbChangeMachinePasswordMessage = 2,
        KerbVerifyPacMessage = 3,
        KerbRetrieveTicketMessage = 4,
        KerbUpdateAddressesMessage = 5,
        KerbPurgeTicketCacheMessage = 6,
        KerbChangePasswordMessage = 7,
        KerbRetrieveEncodedTicketMessage = 8,
        KerbDecryptDataMessage = 9,
        KerbAddBindingCacheEntryMessage = 10,
        KerbSetPasswordMessage = 11,
        KerbSetPasswordExMessage = 12,
        KerbVerifyCredentialsMessage = 13,
        KerbQueryTicketCacheExMessage = 14,
        KerbPurgeTicketCacheExMessage = 15,
        KerbRefreshSmartcardCredentialsMessage = 16,
        KerbAddExtraCredentialsMessage = 17,
        KerbQuerySupplementalCredentialsMessage = 18,
        KerbTransferCredentialsMessage = 19,
        KerbQueryTicketCacheEx2Message = 20,
        KerbSubmitTicketMessage = 21,
        KerbAddExtraCredentialsExMessage = 22
    }

VB Definition:

Enum KERB_PROTOCOL_MESSAGE_TYPE
   TODO
End Enum

Notes:

None.