Hi Faisal Ahmed,
This forum is for Windows Installer and ClickOnce. Question about InstallShield, you can post on InstallShield forum for better response.
Since InstallShield is Windows Installer based tool, we can create path with the tools in Window Installer SDK, such as Orca, Msimsp, Patchwiz.dll and so on. Here are the detailed steps to create patch files, which may help you
More information, please check:
http://msdn.microsoft.com/en-us/library/aa368060.aspx
Best regards.
Rong-Chun Zhang
Windows Forms General FAQs
Windows Forms Data Controls and Databinding FAQs