//此例子有个坏处不管用户点了确定还是取消，均返回值

procedure TForm1.Button1Click(Sender: TObject);
var
  connStr:string;
begin
  connStr := PromptDataSource(Application.Handle,ADOConnection1.ConnectionString);

  Memo1.Lines.Add(connStr);
end;

uses
  Data.Win.ADOConEd;
  //必须引用这个单元
  //如果没有修改点击OK按钮后没有返回值，只有修改后才会产生返回值
procedure TForm1.Button1Click(Sender: TObject);
var
  connStr: string;
begin
  if EditConnectionString(ADOConnection1) then
  begin
    connStr := ADOConnection1.ConnectionString;
    Memo1.Lines.Add(connStr);
  end;
end;