How to create a text box that accepts only numbers and full stop in VB.Net

Private Sub txt1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txt1.KeyPress<br />        Try<br />            If Not (Char.IsNumber(e.KeyChar) Or Char.IsControl(e.KeyChar)) Then e.Handled = True<br />        Catch ex As Exception<br />            MsgBox(ex.ToString)<br />        End Try<br />    End Sub