Database

dear my question about combo box in adoo.net via vb.net 
I have Access database contain 3 tables for University colleges and its departments the first tables include the name of college (college of engineering, college of science,…etc.) while second table include the department of college of engineering 3rd table include department of college of science
So who can I do this if I select from combo box 1 for example college of engineering the combobox2 change automatically to table 2 to display only department of college of Eng.
note : the combobox1 bind to table1 by connect ado.net to database using wizard not code