Thanks for the info - but I still cannot get the amount of information available in Outlook Express.
Some time go I changed from using Outlook Express to Outlook and exported all my files to Outlook when I migrated. It would appear that when you migrate the files they are stripped of the hidden information because I cannot get the Email addresses from the migrated files. Messages sent or received using Outlook are OK. I have lost someone's Email address and was hoping to get it from one of their old messages - but no joy.