Outlook 2000

Subject line is set to populate automatically from certain fields. This is
the code:

"REF # " & ":" & [Ref No] & " - " & "RefNoDate" & ":" & [RefNoDate] & " - "
& "Vendor Name/#" & ":" & [Vendor Name and No] &":" & " - " & "Sequence #" &
":" &[SequenceNo]

This is working fine except for the SequenceNo. This is a combo box. Is it
possible to set this up? I tried changing SequenceNo to ComboBox1 but it did
not work.

thanks!