If I run my installer on a system which has the same version of the product installed..it prompts me with a message "Do you want to upgrade product?". How can I disable this in InstallScript MSI project?
I dont want the upgrade prompt, instead I have to display the Maintainence dialog.
Can I override OnSetUpdateMode() function in InstallScript MSI? I tried doing the same, but gave me an error stating prototype not found.
can u try the following.... this approach worked for me... + r u getting this issue with that installer for the first time? + if not and if it is working properly upto now, then check the code difference + if u find difference, check the dependecy of the changed code + revert the changes and test that installer + if it is working properly, then install the same installer in the machine where u r getting the 'upgrade' message, it will go for repair mode + after the upgrade it will create two entries in ARP + then it uninstalled properly
If you check the two installers they will have different package codes. They might even have different product codes, but the same upgrade code.
These GUIDs determine the behavior you will see. In order for a product to be recognized as the same install all the GUIDS must match.
By default a new package code is generated every time you build. Product codes should only be changing when you change them, but not sure about that in an installscript MSI. I have done most of my work in a Basic MSI project.
