This isn't a true DASL filter, so you end up having to use ranges, in a sense. Unfortunately, you can't use Contains, DoesNotContain, etc. from the filter object reference, as you would with the Search objects. It's a little different.

The following will help you find a range of subjects all between 'test' and 'tz':

use strict;
use Win32::OLE qw(in with);
use Win32::OLE::Const 'Microsoft Outlook';
$|++;
$Win32::OLE::Warn = 3; 

my $OL = Win32::OLE->GetActiveObject('Outlook.Application')
        || Win32::OLE->new('Outlook.Application', 'Quit');

    my $NameSpace = $OL->GetNameSpace("MAPI");

    my $Folder =  $NameSpace->GetDefaultFolder(olFolderInbox);
    my $Items = $Folder->{Items};
    my $findtext = '[Subject] > "test" and [Subject] < "tz"';
    my $MailItems = $Items->Find($findtext);
    while (1) {
      print $MailItems->{Subject} ."\n";
      $MailItems = $Items->FindNext() || last;     
   }
[download]

And one should note the following (from the Outlook VB Reference):

Comparison operators allowed within the filter expression include >,<,
+<=, >=,= and <>.

Logical operators allowed are And Not and Or
[download]

Update: Slight modification to search string and Text from Find Object Reference.

C-.

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Flex the Geek