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.

Public Class TestClass

Private sampleData As Integer

Private Sub CheckTheData( )

Dim sampleData As String = "abc"

Me.sampleData = 5

MsgBox(sampleData) ' Displays "abc"

MsgBox(Me.sampleData) ' Displays "5"

End Sub

End Class

See Also

MyBase Keyword, MyClass Keyword

Mid Function

Class

Microsoft.VisualBasic.Strings

Syntax

Dim result = String = Mid(str, start[, length])

str (required; String)

The expression from which to return a substring

start (required; Long)

The starting position of the substring

length (optional; Long)

The length of the substring to extract

Description

The Mid function returns a substring of a specified length from a given string.

Usage at a Glance

•Ifstr contains Nothing, Mid returns Nothing.

•Ifstart is greater than the length of str, a zero-length string is returned. An error

occurs if

start is less than zero.

•Iflength is omitted, or if selecting length characters would exceed the length of

the string, all characters from

start to the end of str are returned.

• Use the Len function to determine the total length of str.

• The Mid function corresponds to the String data type’s Substring method. In the

following code, the two assignments to the

twoOnly variable are identical.

Dim twoOnly As String

Dim threeNumbers As String = "One Two Three" ...