Throw Statement

Throw Statement

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Syntax

     Throw exception 

exception (required; Exception or derived from Exception)

A System.Exception object representing the exception being thrown

Description

The Throw statement initiates an exception that can be handled using either structured exception handling (with a TRy...Catch...Finally statement) or unstructured error handling (with an On Error statement).

Example

     Dim positiveNumber As Integer     Try        ' ----- Throw an exception if the user enters anything other        '       than a positive number.        positiveNumber = CInt(InputBox("Enter number of items."))        If (positiveNumber <= 0) Then           Throw New Exception("Entry must be a positive number.")        End If     Catch ex As Exception        MsgBox(ex.Message)     End Try 

Version Differences

The Throw statement is new to VB under .NET.

See Also

Exception Class, Try...Catch...Finally Statement