Summary

How to apply a condition onto a custom action so it only runs during a silent install

Synopsis

This article will explain how to place a condition onto a custom action so that it will only run if the installer is launched silently.
The condition described uses an MSI property and is therefore only valid for BASIC MSI installations.

Discussion

It is important to note that silent installations skip the UI Sequence, therefore placement of your custom action must be in the Execute Sequence of your installer.

Expand the Exec Sequence tree to locate the condition field - it is here that we can place the condition on your custom action which should be : UILevel=2




The UILevel property is set by the Installer depending on the level of the User Interface and contains a number of different values which are shown below:

Additional Information

Information on how to create silent installations can be found in the command line switches for the Microsoft Windows Installer Tool here:
https://learn.microsoft.com/en-us/windows/win32/msi/standard-installer-command-line-options


Further information regarding the UILevel property can be found here:
http://msdn.microsoft.com/en-us/library/aa372096(v=vs.85).aspx