I think you missed the point. I can see there are two different entry points,
one for install the other for uninstall but what I can't see is the condition
that says to run one on install and the other on uninstall. (Using the SQL one
was probably a bad example as that has an override condition other don't.)
Neil
Neil Sleightholm
X2 Systems Limited
n...@x2systems.com <mailto:n...@x2systems.com>
________________________________
From: Richard [mailto:legal...@xmission.com]
Sent: Fri 20/02/2009 00:19
To: wix-users@lists.sourceforge.net
Subject: Re: [WiX-users] DTF - install, rollback and uninstall
In article <e66649032ad92b42901bf5835c76a27f5...@harwood.x2systems.com>,
"Neil Sleightholm" <n...@x2systems.com> writes:
> I have to admit to being confused! Looking at the built in WiX custom
> actions I see code like this in their wixlibs:
>
> <CustomAction Id="InstallSqlData" BinaryKey="ScaSchedule2"
> DllEntry="InstallSqlData" Execute="immediate" Return="check" />
^^^^^^^^^^^^^^
> <CustomAction Id="UninstallSqlData" BinaryKey="ScaSchedule2"
> DllEntry="UninstallSqlData" Execute="immediate" Return="check" />
^^^^^^^^^^^^^^^^
These define two CAs with different entry points into the same DLL.
> <InstallExecuteSequence>
> <Custom Action="UninstallSqlData" Before="RemoveFiles"
> Overridable="yes">NOT SKIPUNINSTALLSQLDATA AND VersionNT > 400</Custom>
> <Custom Action="InstallSqlData" After="InstallFiles"
> Overridable="yes">NOT SKIPINSTALLSQLDATA AND VersionNT > 400</Custom>
> </InstallExecuteSequence>
>
> Where is the detection or conditional calls in that? In most cases this
> seems to end up calling the same code but with a true/false code
> indicating install/uninstall.
The two have different code and different conditions (properties
SKIPUNINSTALLSQLDATA vs. SKIPINSTALLSQLDATA).
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