Outlook links in Access and history comments

[admin etc]

Hi,

I have noticed in the templates that you can put links in to add contacts to
Outlook but for the life of me I cannot work out how to do it.

Also in the sales template they use a columnhistory formula to create a
history in the opportunities form, while I can replicate this when the data
is coming from a form I cannot get it to work if the data of the form is
coming from a query, the formula is
=ColumnHistory([RecordSource],"Comments","[ID]=" & Nz([ID],0))

can someone please help

Thanks

Narelle