title: Apply Input Mask for a ToolStripComboBox C#
body: <p>I was just wondering if anyone has come across how to apply an input mask for a Tool Strip Combo Box in C#?</p>
  
  <p>My drop down box gets populated over time with IP addresses, and I would like to restrict what the users are able to write in (Ex: can only input 3 '.'s, only numbers, etc).</p>
  
  <p>So if anyone is able to help out I would really appreciate it!</p>
  
  <p>Thanks in advance.</p>
  
  <p><strong>Edit</strong></p>
  
  <p>My design has changed so I now need to have a ToolStripComboBox</p>