title: go back one tab index
body: <p>probably a simple one, have a dozen textboxes that each contain one character. i'm try to process the delete key to clear the current text in the current textbox, then i want it to decrement the tab index by go and go back to edit the previous textbox. i don't know how to reference the current textbox's tab index and go back one. to go to the next one i'm merely performing a send key for 'TAB'.</p>
  
  <p>in my keyprocess function i have:</p>
  
  <pre><code>//DEL goes back one text box and clears it
              if (keyData == (Keys.Delete))
              {
                  //Clear textbox
                  //Go back one textbox to edit
                  return true;
              }
  </code></pre>
  
  <p>again once i finished editing a text box i am sending:</p>
  
  <pre><code> SendKeys.Send("{TAB}");
  </code></pre>
  
  <p>maybe there is a better way to do this.</p>