How to convert a date in a textbox to a date in vb 2010

This can't be this hard but here's my problem

I have a date in a TextBox in this format "03081960".

I need to convert the date in the textbox into a date format to use in a DateDiff instruction.
The textbox is named "TextBox16"

What is the code for converting the date in the textbox??

Dim Mydate as date = ????????????????????
Dim TimeDif As Integer = DateDiff(DateInterval.Year, Now, mydate)