Visual Basic 2005 in a Nutshell, Third Edition

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Chapter 12: The Language Reference

This is the Title of the Book, eMatter Edition

Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.

Usage at a Glance

Type parameters added with the Of keyword cannot be used with Common Language

Specification (CLS) compliant components.

Version Differences

Generics and the Of keyword are new with Visual Basic 2005.

See Also

Class...End Class Statement, Delegate Statement, Function Statement, Interface...End

Interface Statement, Structure Statement, Sub Statement

On Error Statement

On Error { GoTo { label | 0 | -1 } | Resume Next }

label (required, unless 0 or -1 used)

A valid label within the procedure

Description

The On Error statement enables or disables error handling within a procedure. Error

handling is performed either by using a

Try...Catch...Finally statement or with an On

Error

statement. The On Error statement has several variations.

On Error GoTo label

When an error occurs, execution continues within the procedure at the line

marked with

label.AResume statement can be used within that block of code to

return to the errant section of code.

On Error GoTo 0

Disables error handling in the current procedure. This is the same as if no error

handlers were ever enabled in the procedure in the first place.

On Error GoTo -1

Used inside of an error handler to make the code forget that it is inside of an error

handler. It says, “Forget that the error ever ...