Can anyone tell me the best way to deploy updates to .NET applications on
machines that already have the application installed? We have a VB .NET
application that was built with a setup project a year ago. It has been
installed on several machines. We recently made a modification to the
program, rebuilt both the application and the setup project. When we try to
install the new version we receive a message that the Windows Installer
cannot install the application because the application already is installed
on the workstation. This application gets deployed to agents in the field so
I don't want to have to make them uninstall the application just to
re-install it so they can get the updates.

Thanks for any help.

Nancy