Progress!!! With a little bit of guess work, and adding the suggestions from this board, I have managed to get a rotine which now happily reads round all the folders and subfolders in my Outlook.

use strict;
use Win32::OLE;
use Win32::OLE::Const 'Microsoft Outlook';
use Win32::OLE::Variant;
use Time::Local;
use POSIX;

#open the Outlook program
my $outlook;
eval {
  $outlook = Win32::OLE->GetActiveObject('Outlook.Application')
};
if ($@ || !defined($outlook)) {
  $outlook = Win32::OLE->new('Outlook.Application', sub {$_[0]->Quit;}
+) or die "oops\n";
}

my $namespace = $outlook->GetNameSpace("MAPI") or die "can't open MAPI
+ namespace\n";
my $Folder;
my $subfoldernm = "Calendar";
my $sheetcnt = $namespace->Folders->Count();
foreach (1..$sheetcnt){
   $Folder = $namespace->Folders($_)->{Name};
   print "\n\t No.". $_ ." Folder Name - >" .$Folder ."<\n";
   print "\n\t\tNo.\tItems\tItems";
   my $subfldrcnt = $namespace->Folders($Folder)->Folders()->Count or 
+my $dummy = "true";

   foreach (1..$subfldrcnt){
       my $subfolder = $namespace->Folders($Folder)->Folders($_)->{Nam
+e} or die "cant access folder $Folder";
       my $itemcnt = $namespace->Folders($Folder)->Folders($subfolder)
+->Items()->Count or my $empty = "true";
       print "\n\t\t$_\t$itemcnt\t$subfolder";

   }
}
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I now need to work out how to store a calendar entry away. I guess this means a two part task. Firstly to "select" the correct calendar folder to store the entry in, secondly to generate the entries to store away.

From the results of my current routine, I can see that for testing purposes, the folder I need is "Personal Folders" and the subfolder is "Calendar"

I'm thinking that some code along the lines of :-

       my $cal = new Win32::OLE('Outlook.Application');
       $cal->{'Visible'} = 1;
       my $item = $cal->CreateItem(0);
       $item->{'Subject'} = "perl test";
       $item->{'Location'} = "Test Location";
       $item->{'Start'} = "04/30/2002 12:00";
       $item->{'End'} = "04/30/2002 12:30";
       my $selectfolder = $namespace->Folders($Folder)->Folders($subfo
+lder)->Items()->Add($item) or " **** can't add item";
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but I suspect this is only the half of it.

As before, does anyone have any ideas?

I did find some code to generate an e-mail entry, and am thinking that the code to generate a calendar entry wouldn't be that dissimilar.

#my $mail = new Win32::OLE('Outlook.Application');
#$mail->{'Visible'} = 1;
#my $item = $mail->CreateItem(0);
#$item->{'Subject'} = "This is a test";
#$item->{'To'} = "david.booth\@easynet.co.uk";
#$item->{'Body'} = "Here is the meat of the message";
#$item->Send();
#$mail->Quit();
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As ever any suggestions as to how best doing this will be most gratefully received