How to make contingent boxes on Microsoft Access

[ssok1990]

How do I make boxes on Microsoft Access that are contingent with other boxes? For example, when you fill out a form, if you select a country the next box should only show the states within that country that was just selected. If you select a state then the next box should only show the counties within that state.

For my work, I'm making a database with proposals and I need to input some boxes that are contingent on other boxes. Please help!

[TheSmileyCoder]

The concept you are looking for is known as cascading comboboxes. I suggest you take a look at this insights article by one of your experts, Rabbit.
Cascading Combo/List boxes

[NeoPa]

Another one you may find helpful is Cascaded Form Filtering. I'm sure you'll find there all you need.