DecodeNAFCountCode
function DecodeNAFCountCode (const Key : TKey; const Code : TCode) : LongInt;
DecodeNAFCountCode uses Key to decode Code and returns the number of authorized users as the function result.
Key must be the same key that was used to create the code or the code is considered invalid. If the code is invalid, 0 is returned.
This routine is defined in the OgNetWrk unit.