Untitled

Public Class Form1
    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        End
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        Dim a As Integer
        a = Val(TextBox1.Text)

        If (a >= 0) Then
            MsgBox("The number you inputed is  " & a & " Thank you .")
        End If



    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
        TextBox1.Text = " "
        TextBox1.Focus()
    End Sub
End Class