How to protect excel sheet and formulas

[vivek_vx]

Hi Friends, I want to lock my excel file so no one can view or edit formulas, VB functions or manually delete or modify worksheet data,
I have 3 sheets Input, Inventory and Stock, If I enter data in input it automatically add to inventory sheet and calculate running total in stock sheet. once its done the input sheet gets blank for next data entry,
I tried to protect cells containing formula and assign password to sheet but when I enter data in Input sheet it wont write to inventory sheet and also doesn't get blank.

Pls Help....

[p45cal]

for others, cross posted:
http://www.vbaexpress.com/forum/show...t-and-formulas
http://www.excelforum.com/excel-prog...-formulas.html

for vivek_vx, some light reading:http://www.excelguru.ca/content.php?184