Such as a Xml structure is like this:

 
<? The XML version="1.0" encoding="utf-8"?> 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

The Layer properties represent in which ComboBox, according to the Index represent the Index position of the show, the Name on behalf of the display area of the Name or code,
Use two ComboBox as two levels of menu, how to do?
After ForEach traversal, can't do with the Select case,