Can ExePackage update Bundle variable value at runtime

Question

I have written a managed bootstrapper application using WiX toolset's burn API and it works great. Currently it chains 2 MSI packages. Now I need to chain a exe package before the 2 MSIs. This exe package will obtain a value (when it runs) which it needs to pass back to the bootstrapper. Basically, the bootstrapper has a bunch of variables which it uses to populate properties in the 2 MSIs. One of these variables now needs to be updated by the exe package at runtime, so the corresponding MSI property reflects the correct value.

I have looked around and not been able to find anything that indicates that this can even be done. These two links (here and here) speak of similar things, but they all mention that burn variables can be updated at runtime via command-line or within the bootstrapper itself. Not how a ExePackage could pipe back an update to a bundle variable, which is what I need to do.

Would appreciate any feedback.

[UPDATE]

Found a comment by the WiX developer here that points to some sort of communication mechanism between an ExePackage and the bootstrapper.

Answer 1

There's no mechanism to let a package communicate with the Burn engine, other than to indicate success or failure.