Ok, thanks a lot for your explanation.
So if I correctly understood what you said, I must declare my custom
action as deferred. So I guess I write it this way:
<CustomAction Id='ConfigureHttpConf' BinaryKey='apmwsinst.dll'
DllEntry='apm_edit_conf' Execute='deferred' Return='check' />
<InstallExecuteSequence>
<Custom Action='ConfigureHttpConf' After='InstallFiles'>NOT
Installed</Custom>
</InstallExecuteSequence>
Is the "After='InstallFiles'" still correct?
Thanks again?
Mike Dimmick a écrit :
In effect, Windows Installer makes two passes over the actions in between
InstallInitialize and InstallFinalize. In the first pass, by the client
process that called MsiDoAction (which is msiexec.exe if you just ran an
.msi from Explorer), the installer writes out a script for the tasks each
standard action and *deferred* custom action must perform, but it doesn't
actually do them yet. Any *immediate* custom actions are, as the name
indicates, executed immediately when encountered.
The script generated is then handed off to the Windows Installer service
when the InstallFinalize action is encountered in the execute sequence. It's
this script which actually installs the files.
If you want to modify a file you're installing, you'll need a deferred
custom action. This has the limitation that it cannot read the original
database, only a special custom action data property which has the same name
as the custom action, plus a few other properties (only the script is passed
across to the Windows Installer service). The pattern that WiX uses is an
immediate custom action that appears in the execute sequence, which reads
tables to work out what to do, then schedules one or more deferred custom
actions to actually do the work (passing the commands in the custom action
data for the deferred actions).
If you do this, be sure to set the Modified and Created timestamps to the
same value, otherwise when you come to apply an upgrade, Windows Installer
will think that the user has modified the file and will not overwrite it.
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