3 replies to this topic

[ConfigControl]

How to determine what state the Windows Installer is in?
I need to know if the installer is in the process of installing, rollingback, or uninstalling. I have a deferred custom action that I want executed only on installing and not on uninstalling or rollingback. Is there a property that can be used to determine this?

[Ian Blake]

MsiGetMode can be used with the MSIRUNMODE_ROLLBACK flag to determine if a rollback or install operation is in progress even in deferred actions.

Uninstallaion is just another type of install operation so you should condition your action on the state of the relevent components and features.

see Documentation

Windows Installer
--Installer Database
----Installer Database Reference
------Database Functions
--------MsiGetMode
and

Windows Installer
--Installer Database
----Using The Installer Database
------Conditional Statement Syntax

[pdriley]

Isn't the condition Not Installed supposed to be "On first time through"

[Ian Blake]

Yes but it not that useful in this context. The CA may be potentially required in a maintenance or repair operation.