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Event Driven Programming

Figure 3.8: TextBox.

3.4.1.1 Some Notable Properties

Some important properties in the behavior section of the Properties Window for TextBoxes.
Enabled: Default value is True. To disable, set the property to False. Multiline: Setting this
property to True makes the TextBox multiline which allows to accept multiple lines of text.
Default value is False. PasswordChar: Used to set the password character. The text displayed in
the TextBox will be the character set by the user. Say, if you enter *, the text that is entered in
the TextBox is displayed as *. ReadOnly: Makes this TextBox readonly. It doesn’t allow to enter
any text. Visible: Default value is True. To hide it set the property to False.

3.4.1.2 Appearance Section Properties
TextAlign: Allows to align the text from three possible options. The default value is left and you
can set the alignment of text to right or center.
Scrollbars: Allows to add a scrollbar to a Textbox. Very useful when the TextBox is multiline.
You have four options with this property. Options are None, Horizontal, Vertical and Both.
Depending on the size of the TextBox anyone of those can be used.

3.4.1.3 TextBox Event
The default event of the TextBox is the TextChanged Event which looks like this in code:

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As _
System.EventArgs) Handles TextBox1.TextChanged

...
End Sub

3.4.1.4 Working With TextBoxes
Lets work with some examples to understand TextBoxes.
Drag two TextBoxes (TextBox1, TextBox2) and a Button (Button1) from the toolbox.
Code to Display some text in the TextBox

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