Drop a label and a button on the form. Double click the button to generate a Click event and then modify the event so it looks like this below.

private void button1_Click(object sender, System.EventArgs e)
{
com.sapago.www.Services myService = new
      SPWebServices.com.sapago.www.Services();
label1.Text = myService.ServerTime();
}

When you myService and type a period Visual Studio’s IntelliSense will give you the name of the methods you can call.

Launch you application and click the button. Each button click will instantiate a new instance of the web service and call the method finally assigning the value you client receives back to the text property of your label.