I am writing my own script for a simple calculator that determines if a number is prime, and its prime factors. Currently my code looks like:

Code:
 Private Sub primebutton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles primebutton.Click
        Dim oWrite As System.IO.StreamWriter
        oWrite = File.CreateText("C:\TempFactors.txt")
        TestLabel.Text = ""
...