Vb.Net - Class to Change Textbox BackColor Dynamically

Question

I\'d like to know how to create a Class to change each textbox BackColor inside a Form. To be more Specific:

1. When the textbox Is Empty, the textbox BackColor e

Answer 1

All you need to do is inherit from the TextBox control.

Public Class TextBoxEx
    Inherits TextBox

    Private Sub TextBoxEx_Enter(sender As Object, e As EventArgs) Handles Me.Enter
        Me.BackColor = Color.LightCyan
    End Sub

    Private Sub TextBoxEx_Leave(sender As Object, e As EventArgs) Handles Me.Leave
        If Me.Text <> "" Then
            Me.BackColor = Color.LightGreen
        Else
            Me.BackColor = Color.White
        End If
    End Sub
End Class

Build your project and then replace your TextBox controls with the new TextBoxEx control.