How to set a check box to “unchecked” from the msiexec command line?

Question

I have an msi (authored with WIX) that has a check box bound to a custom property (call it MY_PROPERTY). I would like to run this msi from the command line, specifying 0 (u

Answer 1

This is how it is "supposed" to work - basically, the property doesn't exist until a user checks the checkbox, then it is "set" (exists). So if you want to do a custom action when a checkbox is checked, you test for the existence of the property as a condition for running the custom action, instead of checking for the value that the custom prop is set to.

I think the best way to handle this from the command line is what you have already mentioned: if you want the checkbox to be selected, specifiy the custom prop on the command line, otherwise, don't and the checkbox will not be selected.