Extracting the Registry entries for COM DLLs and EXEs during build time is not supported in WIX. But, they provide an option for writing an extension. The Registry data can be extracted by making use of Heat. Hence, I am making use of Heat.exe, and extension facility of WIX. So, while pre-processing the Wxs file using Candle, we can generate all the Registry data. I am still not sure what to do with the rgs data. But this solves at least half of the problem for the installer guys. Hope this helps many installer guys looking for such a utility.
