I have three comboboxes. I want to be able to select from the first one and have the other two show the related data. For example in the first I pick a category - there are six categories. When I choose a category the second combo box now shows the five items for that category, and the third combobox shows the five levels for that category.
I can then select the category, select the item (one of five), and then select the level (one of five).
How would I do this?