I need to uninstall 'some' previous version of ActivePerl.

I can 'Run Program' msiexec.exe, but need to extract the uninstall command from the registry. "Ideally, Get Registry Key Value" would take wildcards, but if not, then I need a way to extract the Product Code/GUID for an installed Program, searching by DisplayName, so I could assemble a proper Get Registry Key Value.