Decode OLE Tags

There is some Ruby software here that decodes OLE .msg files for Outlook. Here is the link: [login to view URL] Here is the official .msg file specification from Microsoft: [login to view URL]%5BMS-OXMSG%[login to view URL] If you open a .msg file you will see many streams. Here's an example: __nameid_version1.0 __substg1.0_00020102 __substg1.0_00030102 __substg1.0_00040102 __substg1.0_10100102 __substg1.0_001A001E __substg1.0_0037001E __substg1.0_10090102 __substg1.0_3FF8001E __substg1.0_3FF90102 __properties_version1.0 __recip_version1.0_#00000000 ... __attach_version1.0_#00000000 ... __attach_version1.0_#00000001 ... From my understanding, in this example: substg1.0_10090102 1009 would be the "property number". But, I think somehow it is encoded and may actually be a different number (refer to Microsoft PDF spec or Ruby application, both of which seem to be processing that correctly). I need to know how to decode this to obtain the correct "property" number, and would like it in Perl format in a modified version of this file: [login to view URL] I can supply some sample .msg files for you to test as well.