You may need to create a GUID at runtime. One reason could be to simply have a unique number that identifies each workstation.
By the way the last group of digits in the GUID generated on a computer is its network card number (if any is present).
Delphi does not have the needed definitions, here they are:
function CoCreateGuid (pGUID : TGUID) : longint;
external 'OLE32.DLL';
procedure TForm1.FormCreate(Sender: TObject);
var
udtGUID : TGUID;
lResult : longint;
begin
lResult := CoCreateGuid(udtGUID);
// see definition of TGUID in Delphi's online help
// udtGUID.D4 = network card's number
end;