[RESOLVED] highlight active textbox

[jmcilhinney]

If you want to do it with the BackColor then you need to change the colour for every TextBox when it receives focus and when it loses focus.

Private Sub TextBox_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.Enter, TextBox2.Enter
        DirectCast(sender, TextBox).BackColor = Color.Blue
    End Sub
 
    Private Sub TextBox_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.Leave, TextBox2.Leave
        DirectCast(sender, TextBox).BackColor = SystemColors.Window
    End Sub