I agree with Teme64
Here is a small sample
Try statement1 statement2 Catch [ exception [ As type ] ] [ When expression ] ' or simply catch (for all statement1 statement2 [Catch ... ] ' you can have diff. catches for diff. exceptions Finally 'this is optional statement1 statement2 End Try
Try identifies the block of code for which particular exceptions will be activated
Catch block will check for all (or specified) exceptions and will execute the statements that follow in case these exceptions occur
Finally block will get executed whether an exception is thrown or not
This question is obvious, "What can I do to Unhandled exceptions" obvious your application won't run if you unhandle exceptions so you need to handle it, there are quite a number of samples, tutorial guides out there on the net gloogling could have given you lots of them, and the question you should be asking is "how to" handle exceptions.
As being said the "Try" statement or method will help you with handling your exceptions.