Simple Question

I'm kind of new in Visual Basic but done a macros for some time. Ok so here is my problem. I have this code, it is a small code, basically what I want is if then number is below 133000 a message box to show the msg, after the box i clicked on the code will start from the top.
If this is not the place for questions like this can someone point me to where I shall post questions

If strT > 1000000 Then
strTseries = strTruckseq / 10

ElseIf strTseries < 133000 Then
MessageBox.Show("INVALID NUMBER")
TextBox1.Clear()
Button1_Click(sender, e)

Thanks