I would like to hire a Visual Basic Developer

i have a excel 2010 workbook with worksheets sheet1 to sheet10. it is on server and any user in domain can open the file and enter data [login to view URL] sheet1 i require a vba code to do the following column A has name column b has size column c has username(windows username) column d is date time(dd/mm/yyyy hh:mm) if a user enters/modifies in a cell in column A OR B column then the windows username and date and time must be populated in same row in column c and d resply. The date and time must not change with change in date. that is to say the date and time of entry of data in cell my server has window server std 2008 r2 and client machines has window 2007 os and ms office 2010 2. for sheets 2 to 10 same as above - user name and date time columns will not be in C AND D . it will be some other column say Z and AA i would like the code and password protect it thanks and regards raghu murthy