This is the problem to solve.
You are using a ComBoBox with Style= 0 ( You can type value in the text box)
Your RowSourceType = 5-Array

Question is, what is the best way to grab the value typed by the user and adding it to the array if the combo box. This must work without knowing the array.

Problematic:
What event will you use?
Do you need to add properties or method to do this?