Step-by-Step: A First ClickOnce Application

ClickOnce automatically starts your default browser (Microsoft only guarantees that it will work with Internet Explorer) with the generated page (the Output window in the previous page shows the page being created) which will install the system. The Install button actually calls setup.exe and you can simply execute Setup.exe yourself to get the same result. Both setup.exe and publish.htm are in the root of the directory for the web page. Unless you have a security certificate (nearly all of you won't), you get a security warning screen that you have to confirm and the application is started, in this case from the IIS server on your local computer.