Visual Basic 2015 Unleashed

Handling Exceptions with Try..Catch..Finally Blocks

You perform exception handling by writing a Try..Catch..Finally code block. The logic is that you say to the compiler, “Try to execute the code; if you encounter an exception, take the specified actions; whenever the code execution succeeds or it fails due to an exception, execute the final code.” The most basic code for controlling the execution flow regarding exceptions is the following:

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Try    'Code to be executedCatch ex As Exception    'Code to handle the exceptionEnd Try

IntelliSense does a great job here. When you type the Try keyword and then press Enter, it automatically adds the Catch statement and the End Try terminator. The ex variable gets the instance ...