I am really not sure what event procedures to use for a ComboBox control pertaining to a particular application. Here is my scenario.

First off, both ComboBoxes have the "Droppeddown" property set to true when the control receives focus. The 2nd ComboBox is populated based on the value from the 1st ComboBox.

Next, which events should be fired:

1. When a user uses a mouse to select data from the list?
2. When a user uses the up/down arrow to select data from the list?


Thanks,