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Uninstall path for the 'Remove' button in Add/Remove programs

Posted on 2007-03-29
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Last Modified: 2010-05-18
I have written a custom installer application that executes an MSI file to register some dlls and copy the program files to the users machine. When the MSI runs it adds the program name to the Add/Remove programs list in the control panel. I want to modify the path of the program that the 'Remove' button executes so that it executes my custom installer program, not the MSI that is packaged with my installer. Can anyone please shed some light on this? I have looked through the registry, but have not been successful, it seems no matter what I change in the registry, the 'Remove' button always executes the MSI.

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Question by:asmyatt
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kingtam2000 earned 500 total points
ID: 18820418
The problem is that MSI installations override the UninstallString key in the registry.  The key WindowsInstaller, when set to 1, automatically uses the msiexec /x to uninstall, ignoring the UninstallString key.  In order to use the UninstallString key, set WindowsInstaller to 0 to make the add/remove programs use the UninstallString key, which you can set to your custom installer, to uninstall the program.

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by:asmyatt
ID: 18820686
that worked great!

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by:asmyatt
ID: 18822848
Can you tell me why it adds two entries in the Add/Remove programs list. When the 'Remove' button is clicked for the first entry it executes my installer, but when the 'Remove' button is clicked for the second entry it executes the MSI. Is there another key that I need to change so that the second entry does not show up.

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by:kingtam2000
ID: 18825213
Yeah, sorry about that, I just had a search and realised that method was incomplete.  In order to do it without a second entry showing up, you need to create your own entry, which could just be a copy of the key, but with the WindowsInstaller set to 0 and the UninstallString pointing to your own installer, and set ARPSYSTEMCOMPONENT in the Windows Installer properties to 1.  This prevents the windows installer version from showing up on Add/Remove programs by setting SystemComponent in the registry to be 1.  I got this information off http://www.pcreview.co.uk/forums/thread-1544595.php
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by:asmyatt
ID: 18825399
thank you
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