KSR
Do you want to increment Invoice Numbers?
Be careful what you ask for....you may get it<g>
Would you like the number to increase each time the workbook is opened even if
no changes are made?
Would you like the number to change when the workbook is closed, saved or
printed?
Read this google search thread to find out options and see code.
http://snipurl.com/8co5
and this one
http://snipurl.com/8cob
Gord Dibben Excel MVP