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The Multi-Line Text Box

 

Introduction

The regular text box is meant to display a piece, or one line, of text. If the user enters text and presses Enter, nothing particular happens. If the user enters text and presses Tab, the focus moves to the next control in the tab sequence. You may want to create an application that goes further than the one-line limit. For example, if you have used Notepad, you would know that it shares the font characteristics of a text box but it also allows some text navigation features that require more than one line. You can create such an application based on the text box control.

Creating a Multi-Line Text Box

The TextBox control is equipped with one particular property that, when considered, changes the control tremendously. This property is called Multiline. Multiline is a Boolean property whose default value is false. If it is set to a true value, it allows the control to display multiple lines of text, unlike the normal text box that can display only one line. Here is an example:

Imports System.Drawing
Imports System.Windows.Forms

Module Exercise

    Public Class Starter
        Inherits Form

        Private txtMemo As TextBox

        Dim components As System.ComponentModel.Container

        Public Sub New()
            InitializeComponent()
        End Sub

        Public Sub InitializeComponent()

            Text = "Memorandum"

            txtMemo = New TextBox
            txtMemo.Location = New Point(10, 10)
            txtMemo.Width = Width - 30
            txtMemo.Height = Height - 50
            txtMemo.Anchor = AnchorStyles.Left Or _
                              AnchorStyles.Top Or _
                              AnchorStyles.Right Or _
                              AnchorStyles.Bottom

            txtMemo.Multiline = True

            Controls.Add(txtMemo)

        End Sub

    End Class

    Function Main() As Integer

        Dim frmStart As Starter = New Starter

        Application.Run(frmStart)

        Return 0
    End Function

End Module

This would produce:

Multiline Text Box

 

 

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