title: How to add a button to the upper left corner of TabControl?
body: <p>I have a C# 2.0 WinForms application, looks like this</p>
  
  <p><img src="https://i.stack.imgur.com/W91z2.png" alt="my current project"></p>
  
  <p>How to add a button to the upper left corner of TabControl, looks like this?</p>
  
  <p><img src="https://i.stack.imgur.com/EyFVN.png" alt="enter image description here"></p>
  
  <p>I am very grateful for your help.</p>