Please help me how to make a protection to lock excel sheet to work only in
certain PCs.
When opening a worksheet it could be in a auto_open code and check for
example MAC-address of the PCs lan adapter.
After comparing allowed MAC-addressed macro should then either close sheet
or allow it to be opened.
If its hard to lock to MAC-address, anything else check will do fine, this
protection isn't intended for the profesionals, only for normal endusers.

Jason