The first example imports all Excel constants names into the main namespace and prints the value of xlMarkerStyleDot (-4118).

    use Win32::OLE::Const ('Microsoft Excel 8.0 Object Library');
    print "xlMarkerStyleDot = %d\n", xlMarkerStyleDot;

The second example returns all Word constants in a hash ref.

    use Win32::OLE::Const;
    my $wd = Win32::OLE::Const->Load("Microsoft Word 8.0 Object Library");
    foreach my $key (keys %$wd) {
        printf "$key = %s\n", $wd->{$key};
    }
    printf "wdGreen = %s\n", $wd->{wdGreen};

The last example uses an OLE object to specify the type library:

    use Win32::OLE;
    use Win32::OLE::Const;
    my $Excel = Win32::OLE->new('Excel.Application', 'Quit');
    my $xl = Win32::OLE::Const->Load($Excel);