TextBox (txt)

TextBox - Allows you to display text and to allow the user to enter information.

A multilane textbox has a practical limit 32KB of text. if you require any more text then you will have to consider using a RichTextBox.

TextBox does not support BackColor = Transparent ??

No Vertical Alignment

Unlike a label control a textbox has no vertical alignment
Using labels as textboxes - there are several advantages as labels are readonly by default
TextBox to resemble a Label
BackColor = Control
ReadOnly = True
BorderStyle = None

Label to resemble a TextBox
BackColor = White
ReadOnly = False
BorderStyle = Fixed3D

Doesn't Accept Ampersand (&)

A single ampersand is not displayed in a label and must be changed to a double ampersand (&&)

Examples

Useful Code

Removes the selection in the textbox

txtTextBox1.Select(0,0) 

Selecting All

txtTextBox.SelectionStart = 0; 
txtTextBox.Selection.Length = txtTextBox.Text.Length(); 

Read-Only textbox

Have to use a label instead to look like a textbox because Read-Only make the background grey ??

??

Private Sub txtTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms) Handles txtBox1.KeyPress, txtBox2.KeyPress 
If (e.KeyChar = Microsoft.VisualBasic.ChrW(1)) Then 
   DirectCast(sender, Windows.Forms.TextBox).SelectAll() 
End If 
End Sub 

Restricting to only Numbers

Private Sub txtTextBox_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms) 

   ''this allows a Ctrl + V in the text box
   If Microsoft.VisualBasic.Asc(e.KeyChar) = 22 Then 
      Exit Sub 
   End If 

   ''this allows a Ctrl + C in the text box 
   If Microsoft.VisualBasic.Asc(e.KeyChar) = 3 Then 
      Exit Sub 
   End If 

   ''this allows a Ctrl + X in the text box
   If Microsoft.VisualBasic.Asc(e.KeyChar) = 24 Then 
      Exit Sub 
   End If 

   If (e.KeyChar < "0"c Or e.KeyChar > "9"c) And _ 
      Not (Microsoft.VisualBasic.Asc(e.KeyChar) = 8) Then 

      e.Handled = True 
   End If 

End Sub 

Properties

Methods

Events