unit2.~pas

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unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Buttons;

type
  TForm2 = class(TForm)
    procedure BitBtn2Click(Sender: TObject);
    procedure BitBtn1Click(Sender: TObject);
  private
    { Private declarations }
  public
   ComSetting: string;
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation
 uses
  unit1;
{$R *.dfm}

procedure TForm2.BitBtn2Click(Sender: TObject);
begin
ComboBox1.Text:='9600';
ComboBox2.Text:='n';
ComboBox3.Text:='8';
ComboBox4.Text:='1';
end;

procedure TForm2.BitBtn1Click(Sender: TObject);
var
  ComSetting: string;
begin
 //默认值为 '9600,n,8,1'

 Form2.Close;
end;

end.