There are several types of protection.
1. Password to open the file. Can be set at File>Save As>Tools>General
Options.
2. Password on a protected worksheet. This is set at Tools>Protection>Protect
Sheet.
Many functions can be disabled using this type of protection.
3. Workbook Protection password. This is set at Tools>Protection>Protect
Workbook.
This protects the workbook from having sheets deleted and other functions
disabled.
4. VBA Project password to prevent viewers from looking at code modules.
NOTE: except for File to Open protection and VBA project passwords, most forms
of Excel protection are very weak and passwords can be easily cracked.
Gord Dibben MS Excel MVP
I know you can pass protect a spreadsheet but does anyone know a way I
can pass protect a tab instead of the entire spreadsheet?
Gord Dibben MS Excel MVP