Question:
How can I retrieve a list of valid time zones from the system?
Answer:
The following example lists the time zones known to Windows.
Example:
uses Registry;
procedure TForm1.Button1Click(Sender: TObject);
var
reg : TRegistry;
ts : TStrings;
i : integer;
begin
reg := TRegistry.Create;
reg.RootKey := HKEY_LOCAL_MACHINE;
reg.OpenKey(
'SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones',
false);
if reg.HasSubKeys then begin
ts := TStringList.Create;
reg.GetKeyNames(ts);
reg.CloseKey;
for i := 0 to ts.Count -1 do begin
reg.OpenKey(
'SOFTWARE\Microsoft\Windows\CurrentVersion\Time Zones\' +
ts.Strings[i],
false);
Memo1.Lines.Add(ts.Strings[i]);
Memo1.Lines.Add(reg.ReadString('Display'));
Memo1.Lines.Add(reg.ReadString('Std'));
Memo1.Lines.Add(reg.ReadString('Dlt'));
Memo1.Lines.Add('----------------------');
reg.CloseKey;
end;
ts.Free;
end else
reg.CloseKey;
reg.free;
end;