Two Type of event-handling Enter and Leave for textBox vb.net

i am Using Two Type of event-handling Enter and Leave in one Function, using with If-Statement.

Any buddy please correct my script.

Private Sub MaskedTextBox_Enter(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OrgNameTextBox.Enter, OrgNameTextBox.Leave        
    If Event = Enter Then
        CType(sender, Control).BackColor = Color.Yellow
        CType(sender, Control).ForeColor = Color.Black

    ElseIf  Event = Leave Then
        CType(sender, Control).BackColor = Color.Black
        CType(sender, Control).ForeColor = Color.White

    End If
End Sub