Combo box values based on other combo box value

[Guest]

I have an excel sheet that I would like to have 3 to 4 combo boxes (possibly
list boxes, I haven't decides yet) that will relate to each other.

First, Is there a way in the code (not in cells on the sheet) to set the
values that the first combo box uses?

Second, After the user selects a value from the first combo box, say it's
"Chevy", the next combo box only has the values, 2500, 2500HD, & 3500HD. If
the user selected Ford, F150, F250, and F350 are the only items in the list.

Is this possible in excel?

 

[Ron de Bruin]

Why don't you use Data validation ?
http://www.contextures.com/xlDataVal02.html