title: wx.TextCtrl and wx.Validator
body: <p>I need to validate the textboxes with wx.Textvalidator.
  Any please help me to do this?</p>
  
  <p>How can i use wx.FILTER_ALPHA with validators and if the user is giving a wrong input how can i give them a message?</p>
  
  <p>i need to validate all the inputs when clicking on the save button?</p>
  
  <p>can any one provide me a sample code for this?</p>