You should include header information with every file you create or edit. Data such as the file name, author name, creation date, update date, editing history, and the like should be included to form the header information. Each function or subroutine should include a brief comment describing the purpose or function of the procedure.
CitectVBA file header example
' FILE IDENTIFICATION
' CitectVBA example named CitectVBA.bas
' Created by Citect Documentation Team
' Created in April 2001