I still haven't found exactly what I was looking for in any kind of documentation, but I was able to adapt some code from http://aspn.activestate.com/ASPN/Perl/Products/ActivePerl/faq/Windows/ActivePerl-Winfaq12.html

I modified the code there to just view the names of the constants provided by GetDocumentProperties. The code I used was:

use strict;
use Win32::OLE;
use Win32::OLE::Const;

my $filename="word.doc";
#my $properties = Win32::OLE::Const->Load("Microsoft Excel"); # use th
+is to see Excel doc properties
my $PropertyReader = Win32::OLE->new('DSOleFile.PropertyReader');
my $properties = $PropertyReader->GetDocumentProperties($filename);
printf "Library contains %d constants:\n", scalar keys %$properties;
foreach my $Key (sort keys %$properties) {
    print "$Key = $properties->{$Key}\n";
}
[download]

You may use any word, excel or powerpoint document in place of word.doc

This returns a list of the properties (38 of them) I was looking for.

Tha parameter to include is just the property from the list below (in all lowercase).

The properties:
AppName, Author, ByteCount, CLSID, Category, CharacterCount, CharacterCountWithSpaces, Comments, Company, CustomProperties, DateCreated, DateLastPrinted, DateLastSaved, HasMacros, HiddenSlides, Icon, IsReadOnly, Keywords, LastEditedBy, LineCount, Location, Manager, MultimediaClips, Name, PageCount, ParagraphCount, PresentationFormat, PresentationNotes, ProgID, RevisionNumber, SlideCount, Subject, Template, Thumbnail, Title, TotalEditTime, Version, WordCount

I have probably revealed an enormous depth of Perl-naivete in what I posted, but it did answer my most immediate need.

I wasted many hours trying to find this information on the web and couldn't find this particular info anywhere. Hope it will help someone else with a similar need.

I would still love for any gurus to point me to a better way to do this, or the unfound documentation that I was looking for. I would also be curious to know if I have missed any similar available file properties.