I have grid that is in rowmode and users cannot enter data. I want to trigger an event to fire when the user presses the down or up arrow, so I can get the selected row. The main grid has a detail window that syncs with the selected row when I click on a row, but I am unable find an event that fires when I use the down or up arrows.

The KeyDown event should work. If that's not true in your case, send a sample that demonstrates the problem to our support service. And what development environment you are using?