Need to prevent uninstall and install during the upgrade scenario

[selvaonline]

Currently we are using installshield 2012, whenever we upgrade the product, the product get uninstalled and again installed. By doing this, we can't maintain customer logged in state. Can we prevent this by just replacing the file when we do upgrade?

Appreciating your help in advance

Regards,
Selva

[Christopher_Pai]

Perhaps your application should support Restart Manager.

http://msdn.microsoft.com/en-us/library/windows/desktop/cc948910(v=vs.85).aspx

[selvaonline]

Hi,
Thanks a lot for your help. Do you have any online sample code which has RestartManager integration in .net applicaiton.