Printing Files Using ProcessStartInfo?

I'm using the following sub to print files automatically:

Code:
Private Sub printFile(ByVal path As String)
Dim p As New System.Diagnostics.ProcessStartInfo(path)
p.Verb = "print"

[code].....

It works great for text, Word, RTF, Excel, PDF, etc. However, images load by default with Windows Picture and Fax viewer and then don't print.It looks from the MSDN docs like I should be able to reset the default application assigned to the extensions and then maybe I could find another app that will print properly. And the OS acts like it's doing that. When I double-click on the file it does open with the new app. But when the above sub runs, it reverts back to trying to open with Windows Picture and Fax Viewer.