VB.Net makes this a short task with the System.Diagnostics class.  One line of code can get this working for you in a click event or you can setup a sub procedure and just send the path to the exe file.

'Sub Procedure

'Just copy and paste this procedure into your code and then just call it

Public Sub LoadFile(ByVal Path as String)

     'Launches the fhe file as long as the system has

     'the application to open it

     System.Diagnostics.Process.Start(Path)

End Sub

'Button Click

'Just copy and paste the one line below into your Click event and

'change the word Path to the full path to the file you are wanting to launch

  System.Diagnostics.Process.Start(Path)

I hope you find some use for this tip.