JCanon,
As the FAQ "Note" implies, this API expects the date and time in GMT (Greenwich Mean Time) or UTC, so you must adjust the DateTime for your local timezone. DOS didn't worry about these things but Windows does. In fact if you format your disk in NTFS the file properties are also stored in GMT and the OS will "adjust" so they look like your current system settings - e.g. in Explorer. If your disk is formatted in FAT16/32, the dates stored for files are strictly local time, and they won't change if you change the TZ or Daylight Savings setting!
Rick