Question

My program will be installed to a path in registry, which has two different values for single user and all users.

So I’d like to have something like:

<Property Id="MYINSTALLDIR">
    if single user, then <RegistrySearch Id='MyRegistry' Type='raw' Root='HKCU' Key='Software\MyApp\Foo' Name='InstallDir' />
    else if ALLUSERS, then <RegistrySearch Id='MyRegistry' Type='raw' Root='HKLM' Key='Software\MyApp\Foo' Name='InstallDir' />
</Property>    

Is this possible?

Answer 1

Perform the two registry searches to two different properties and then use a SetProperty custom action to assign one of the two properties to the real property based on which one has data and which one has a higher priority ( use conditions to drive the execution ).