How to log the installation date to the registry

Question

When an install completes successfully, the date and time and some other info needs to be written to the registry. How can a date be generated and how do you know if an install was completed successfully? (writing to the registry with wix is not a problem).

Answer 1

What about using standard MSI properties Date and Time?

Note: Be warned that despite the documentation indicating the date will always be in the MM/DD/YYYY format, this is not in fact the case. A verbose MSI log on my system (in Australia) shows the property in DD/MM/YYYY format... e.g.:

Property(S): Date = 21/04/2010