function dec2hex(value: dword): string[8];
const
 hexdigit = '0123456789ABCDEF';
begin
 while value <> 0 do
 begin
  dec2hex := hexdigit[succ(value and $F)];
  value := value shr 4;
 end;
 if dec2hex = '' then dec2hex := '0';
end;