Are there any specific areas you need help with?
Take a look at the Quick Start pages for ASP.NET that explain how to bind data to controls and how to use PostBack:
http://samples.gotdotnet.com/quickst...bdatalist.aspx
If you set the AutoPostBack property of the drop-down with makes to True the page will reload when you select a new make. Inside the SelectedIndexChanged you can then get the new data from the database.
HtH,
Imar
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Imar Spaanjaars
Everyone is unique, except for me.