How to use TextBox control

Drag and drop TextBox control from toolbox on the windowForm.

Add text In TextBox

Code: 

  Private Sub Form17_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Hello text will show in textbox
         TextBox1.Text = "Hello"
 End Sub

TextChanged Event of TextBox
Code:

Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
         'entered value will show in Label2
         Label2.Text = "Price is " + TextBox1.Text + " Rs."
 End Sub

When enter the value in TextBox then TextChanged event will fire and entered value will show in Label.

 Textbox Properties

ReadOnly: Makes this TextBox readonly. It doesn't allow to enter any text.

Scrollbars: Allows to add a scrollbar to a Textbox. Very useful when the TextBox is multiline.

Multiline:   Setting this property to True makes the TextBox multiline which allows to accept multiple lines of text. Default value is False.

Private Sub Form17_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load      
         'makes TextBox MultiLine
         TextBox1.Multiline = True
End Sub

Text is written in Multiline.