Tim Haloun wrote:
>From my understanding of the documentation here http://msdn.microsoft.com/en-us/library/aa369546(VS.85).aspx <http://msdn.microsoft.com/en-us/library/aa369546%28VS.85%29.aspx> If you are doing a quiet install or haven't defined a filesinuse dialog with the appropriate controls, the default behaviour is equivalent to selecting ignore. That is, windows installer overwrites what files it can, renames and replaces other files, and schedules a reboot. What I am aiming to do is instead just fail and exit the installation immediately.

I agree with that interpretation; unfortunately, I don't think there's any way to do it, short of an external UI handler to catch the INSTALLMESSAGE_FILESINUSE message. That will require an external .exe as the handler, except in the case of MSI 4.5, where it can be embedded in the .msi package.

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