Oops.  In my hurry I guess I was a bit vague.  What I'm doing is
creating a form to use in conducting peer reviews of engineering
documents.  As each reviewer examines a document, he needs to populate
a number of form fields describing the defect he has found.  Among the
fields will be some in which various chunks of free-text will entered
to describe the problem.  Other fields will contain page numbers, line
numbers, the name of the reviewer, etc.  The key issue is that for
each defect that is to be described, another iteration of the form
will need to be completed.  To make the task easier on the reviewer, I
want to be able to populate some of the fields for him automatically.
His name would be one, hence the VBA snippet (one-line macro was a
quick, but not very clear, description))  application.username.
Similarly, I can use other pieces of VBA to gather other necessary
data; I just haven't stumbled upon the means of getting it into the
form field

I should also explain the general layout of the form.  It is
essentially a table of 4 or 5 rows of various numbers of cells in a
Word document.  Some cells contain labels describing what is to be
entered into the form fields in other cells.  Each time a new defect
is to be logged, a new set of rows is added to the document, so that
when all is complete, there may be four or five pages of consecutive
sets of rows, each describing an individual defect.  I can then write
code to process the table and extract review metrics.

thanks again,

david

Oh good grief this is embarrassing.  I knew I was tired, but not that
tired!

Sub GetUserName()
 Selection = Environ("USERNAME")
End Sub

In Form Field Options:
   Set Run Macro on Entry = GetUserName
   Check  Fill-in enabled

Sorry to waste your time.

david