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Programmatically getting a list of countries from Windows into a TStringList

Hi,

I would like a Delphi function that would read a list of countries from the Windows settings (all of the available countries) and put them into a TStringList.

e.g. function GetCountriesFromWindows: TStringList;

Do you have the code that would do this?

Thanks in Advance,

Richard
0
Richard2000
Asked:
Richard2000
1 Solution
 
TOndrejCommented:
function GetLocaleDataW(ID: LCID; Flag: DWORD): string;
var
  Buffer: array[0..1023] of WideChar;
begin
  Buffer[0] := #0;
  GetLocaleInfoW(ID, Flag, Buffer, SizeOf(Buffer) div 2);
  Result := Buffer;
end;

function GetLocaleDataA(ID: LCID; Flag: DWORD): string;
var
  Buffer: array[0..1023] of Char;
begin
  Buffer[0] := #0;
  SetString(Result, Buffer, GetLocaleInfoA(ID, Flag, Buffer, SizeOf(Buffer)) - 1);
end;

var
  _List: TStringList;

function EnumLocalesProc(LocaleID: PChar): Integer; stdcall;
var
  ID: Cardinal;
  CountryName: string;
  GetLocaleDataProc: function (ID: LCID; Flag: DWORD): string;
begin
  Result := 1;
  ID := StrToInt('$' + LocaleID);
  if Win32Platform = VER_PLATFORM_WIN32_NT then
    GetLocaleDataProc := @GetLocaleDataW
  else
    GetLocaleDataProc := @GetLocaleDataA;
  CountryName := GetLocaleDataProc(ID, LOCALE_SENGCOUNTRY);
  _List.Add(CountryName);
end;

function GetCountriesFromWindows: TStringList;
begin
  Result := TStringList.Create;
  try
    Result.Sorted := True;
    Result.Duplicates := dupIgnore;
    _List := Result;
    if not EnumSystemLocales(@EnumLocalesProc, LCID_SUPPORTED) then
      RaiseLastOSError;
  except
    Result.Free;
    raise;
  end;
end;

// example usage:

procedure TForm1.Button1Click(Sender: TObject);
var
  Countries: TStringList;
begin
  Countries := GetCountriesFromWindows;
  try
    ListBox1.Items.Assign(Countries);
  finally
    Countries.Free;
  end;
end;

HTH
TOndrej
0
 
rwilson032697Commented:
Listening ;-)
0
 
ginsonicCommented:
listening
0
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Richard2000Author Commented:
Hi TOndrej,

Many thanks for the code, here are the points!  I've tried it on my setup (Windows '98 SE) and it correctly retrieved the list of countries.  The only problem I had was that I got an undeclared identifier error with "RaiseLastOSError".  Do I need to add something to the uses clause so that the compiler recognises it correctly?

Richard
0
 
TOndrejCommented:
Thanks for the points.
RaiseLastOSError is a new procedure in Delphi 6 (introduced due to cross-platform code for Windows and Linux).
If you're using earlier version of Delphi, simply use RaiseLastWin32Error instead.
In either case, you'll need to include SysUtils in your uses clause.
0
 
Richard2000Author Commented:
Hi,

Many thanks for your comment.  I'm using Delphi 4 and RaiseLastWin32Error works.

Richard
0

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