How can I check for a duplicate record from a userform? I have tried several
codes from the site, but couldn't find any that addressed multiple fields.

Example: A spreadsheet made to work/look like a form is called a transmittal
letter(DA_Form_200). More or less a cover sheet and a means to track what was
sent and when. A userform allows the user to input a short description of
each record (an Officer Evaluation Report) i.e. last, ssn, rank, startdate,
enddate. The macro in the userform places each short description onto the
spreadsheet (Page 2 of the 'DA_Form_200')in it's own row under the headers
referenced above, which also sorts by last and startdate. (makes it easier
for me and others to see who was mailed and when). At the same time the code
sends the same 'short decr records' to another spreadsheet (Date_Sent) which
just collects all the 'short descr records' so that I only have to look one
place if necessary.

When entering a 'short descr record' (from userform), how do I check for a
duplicate record (last, startdate and enddate fields) in both the 'Page 2' of
the worksheets labeled DA_Form_200 and the worksheet labeled Date_Sent and
have a message box informing me of the duplicate record ask me if I want to
proceed or not?

I hope I did not confuse anyone.