FormatSettings.DecimalSeparator

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
 
type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Edit1: TEdit;
    Label2: TLabel;
    Edit2: TEdit;
    Label3: TLabel;
    Label4: TLabel;
    procedure FormKeyPress(Sender: TObject; var Key: Char);
    procedure Edit2KeyPress(Sender: TObject; var Key: Char);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.FormKeyPress(Sender: TObject; var Key: Char);
 
begin
case Key of
   '0'..'9', #8: ;
   '.',',':
   begin
 
      Key:=FormatSettings.DateSeparator;
      if pos(FormatSettings.DecimalSeparator,Edit1.Text) <> 0
      then Key:=#0;
end;
#13:Edit2.SetFocus;
else key:=0#;
end;
end;
 
 
 
end;
 
procedure TForm1.Edit2KeyPress(Sender: TObject; var Key: Char);
begin
case Key of
   '0'..'9', #8: ;
   '.',',':
   begin
   Key:=FormatSettings.DecimalSeparator;
   if pos(FormatSettings.DecimalSeparator,Edit1.Text) <> 0
      then Key:=#0;
end;
#13:Button1.SetFocus;
else Key:= Char(0);
end;
end;
 
 
procedure TForm1.Button1Click(Sender: TObject);
var
 
   usd:real;
   k:real;
   rub:real;
 
begin
 
   k:=StrToFloat(Ediit1.Text);
   usd:=StrToFloat(Ediit2.Text);
   rub:=usd*k;
 
Label4.caption:=FloatToStr(usd)+'$ = '
                FloatToStrF(rub,ffCurrency,6,2);
 
end;
 
end.

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
var FormatSettings:TFormatSettings;
begin