Mask Edit Box

I have an activeX mask edit box on my form. I have coded the following events, but nothing seems to happen when I run it.

VB Code:

Private Sub AxMaskEdBox1_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles AxMaskEdBox1.Enter
        AxMaskEdBox1.ForeColor = Color.White
        AxMaskEdBox1.BackColor = Color.Blue
    End Sub
 
    Private Sub AxMaskEdBox1_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles AxMaskEdBox1.Leave
        AxMaskEdBox1.ForeColor = AxMaskEdBox1.DefaultForeColor
        AxMaskEdBox1.BackColor = AxMaskEdBox1.DefaultBackColor
    End Sub

I had a similar problem with calendar controls. Am I missing something?