Try Tools - Options - Security tab
to assign passwords to modify or open the workbook

Pedro Mestre wrote:
Dear all,

I am using MS-Excel 97 and I need to protect the all workbook.

I know how to protect worksheet, but when I protect Workbook, it does not
works...

I am doing Tools - Protection - Protect Workbook and then select Structure
and Windows, apply password, save and when I open again the workbook it is
nor protected.

Can you help me?

Thanks a lot.

Kind Regards,
Pedro Mestre