title: Windows Forms Textbox Enter key
body: <p>I have a TextBox, but I can't find any source explaining how to call a function when a button is pressed down.</p>
  
  <pre><code>public Simple()
  {
      Text = "Server Command Line";
      Size = new Size(800, 400);
  
      CenterToScreen();
  
      Button button = new Button();
      TextBox txt = new TextBox ();
  
      txt.Location = new Point (20, Size.Height - 70);
      txt.Size = new Size (600, 30);
      txt.Parent = this;
  
      button.Text = "SEND";
      button.Size = new Size (50, 20);
      button.Location = new Point(620, Size.Height-70);
      button.Parent = this;
      button.Click += new EventHandler(Submit);
  }
  </code></pre>
  
  <p>Some sources tell me to use a function, but I don't understand how it is going to get called.</p>