title: How to avoid adding duplicate items in a Combobox in VB?
body: <p>I have a Combobox on my form for the user to select items in a drop-down box, also they are allowed to enter their own input. I need the user to add items to a combobox <em>without</em> adding a duplicate item already displayed.</p>
  
  <p>For example: 
  the combobox has a list of dog breeds such as (pug, boxer, pitbull). So how do I not allow the user to enter "pug" when they type that into the combobox?</p>
  
  <p>I'm coding in Visual Basic,
  Thank You!!!!</p>