In article <1233847715184-2275419.p...@n2.nabble.com>,
Gremlin <postingpl...@gmail.com> writes:
> how do I know if an application, a hotfix or a ServicePack is uninstalled
> when the uninstallation is executed from the "Add/Remove Programs" - list.
> Is there any useful property for this?
> It's necessary for my Custom Action handling.
If I interpret your question correctly, you want to know the way to
write a condition that evaluates to true when the MSI or patch is
being uninstalled?
To detect when the entire product is being uninstalled, I've used
REMOVE = "ALL".
Patches are applied as a repair operation. I haven't tested it
myself, but I believe that removing a patch would also be performed as
a repair. The way this works is that to apply a patch, the MSI is
modified according to the transforms in the patch and then a repair is
initiated. This will cause the changes to be applied. I expect that
removing a patch is done by reversing the transforms in the patch and
then doing a repair on the MSI causing the changes to be reversed.
There are additional properties that are set when a patch is applied
that let you distinguish between doing a normal repair and applying a
patch. Consult the Windows Installer documentation for more
information on these properties.
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