Summary
In this hour, you've seen the two major error-handling constructs of Try/Catch/Finally and On Error in action. These constructs along with the general design considerations should help you in your error-handling code. The general rule of thumb is to overhandle errors during development and trim back the excess when you near implementation. In addition, you've had a chance to build up a Windows Forms application that utilized a few of the typical error-handling situations that you will face day in and day out. These techniques, coupled with the data updating error conditions, will cover most of what you need for ADO.NET.
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