const
 HKEYNames: array[0..6] of string =
  ('HKEY_CLASSES_ROOT',
  'HKEY_CURRENT_USER',
  'HKEY_LOCAL_MACHINE',
  'HKEY_USERS',
  'HKEY_PERFORMANCE_DATA',
  'HKEY_CURRENT_CONFIG',
  'HKEY_DYN_DATA');
function StrToHKEY(const KEY: string): HKEY;
var
 i: Byte;
begin
 Result := $0;
 for i := Low(HKEYNames) to High(HKEYNames) do
 begin
  if SameText(HKEYNames[i], KEY) then
  Result := HKEY_CLASSES_ROOT + i;
 end;
end;