Run Perl Script And Detect When It's Done?

I'm need to run a perl script from my application and detect when it's done. I plan to check if it's done with a timer so I hear I need to use WaitForSingleObject to detect it's finished

Secondly, this might be the wrong place but I'm asking anyway, I want to send the perl's output to a file so I can read it in when it's done but that part of it isn't working correctly, the exact same string typed into a cmd.exe window works correctly but the shell command still sends the output to the dos window and doesn't generate the file.

NOTE: This is just a test program, it's not how I'm going to do it in the real app.

Imports System.Runtime.InteropServices
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

[Code].....