IsSpecialCodeValid
function IsSpecialCodeValid (const Key : TKey; const Code : TCode) : Boolean;

IsSpecialCodeValid returns true if Code is a valid special code, otherwise false.

Key must be the same key that was used to create the code or the code is considered invalid.

This routine is defined in the OnGuard unit. (as of 1.15 this routine has been moved to the OgUtil unit)