Hi Lynda.

>If I replace Run with ShellExecute can I still do everything in one file?

It works for me.

BTW, even if you're not using Windows 7 as your main OS, you can easily set up a test environment so you don't have to rely on your users to test this. Install Microsoft Virtual PC (you can download it for free from the MS web site), buy a copy of Windows 7, and install it as a guest OS in VPC. You can then start up your virtual Windows 7 on your Vista or XP machine and test how your app works and how the update process runs. It's well worth the hour or so set up time and the few hundred dollars for a Win 7 license to be able to confirm that your app works in your client's environment.

Doug