Hi, Phil: the double returned is almost zero but not quite: 5.02935870345123E-300. I don't know which (IEEE?) representation Delphi is using to store floating point numbers.... but surely it's not zero. What is interesting though is that even though I assume the correct bit pattern gets into the double (reading 8 bytes from the registry into a double can only be done in so many ways), that Delphi is - apparently? - interpreting it as zero as implicated by a date of 30/12/1899.
John: Thanks for the suggestion to look into FileDate/Times - will report back what I find out. Thanks to all for helping out with my Friday Trivia :-) wish you a good weekend, Jan On 14/05/10 12:40, John Bird wrote: > I am pretty certain that 30/12/1899 is a unique start point for Delphi - > other systems (Unix and Windows) look to start at 1970 or 1980. I am > guessing as I haven't dealt with registry dates that you need to do > something similar to a file datestamp - FileDatetoDateTime and/or > FileTimeToSystemTime API > > I saw some code examples at > > http://www.efg2.com/Lab/Library/Delphi/DatesAndTimes/index.html > > which appear to back this up (about 1/4 way down the page). Is the date > value likely to be a windows integer date/timestamp? > > John > > > _______________________________________________ > NZ Borland Developers Group - Delphi mailing list > Post: delphi@delphi.org.nz > Admin: http://delphi.org.nz/mailman/listinfo/delphi > Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: > unsubscribe > > _______________________________________________ NZ Borland Developers Group - Delphi mailing list Post: delphi@delphi.org.nz Admin: http://delphi.org.nz/mailman/listinfo/delphi Unsubscribe: send an email to delphi-requ...@delphi.org.nz with Subject: unsubscribe
