<com:TContent ID="Content"> <com:TPanel DefaultButton="button1"> Panel 1 <com:TTextBox /> <com:TButton ID="button1" Text="Button 1" OnClick="button_clicked" /> </com:TPanel> <com:TPanel DefaultButton="button2"> Panel 2 <com:TTextBox /> <com:TButton ID="button2" Text="Button 2" OnClick="button_clicked" /> </com:TPanel> <com:TLabel ID="label1" /> </com:TContent>