Appendix F : Error Handling

This appendix provides information on error handling.

Structured Error Handling

A Try block tries to execute some code and reacts to errors. The syntax is as follows:

  Try     try_statements... [Catch ex As exception_type_1     exception_statements_1...] [Catch ex As exception_type_2     exception_statements_2...] ... [Catch     final_exception_statements...] [Finally     finally_statements...] End Try 

When an error occurs, the program examines the Catch statements until it finds one that matches the current exception. The program executes the finally_statements after the try_statements succeed or after any Catch block is done executing.