Hi,

I am trying to make several worksheets ' fiddle proof'. I have sheets that
contain macros which will unlock the worksheets, perform the calculation
thats needed, updated the data then relock the worksheet from the click on a
macro. Thats fine.

I just realised however that it is very simple ro ruin everything with a
simple right click on the sheet tab to delete sheets, change code etc etc.

How I eliminate this possibility?

I also have a third sheet which at the moment I've hidden. However if a
user reinstalls the menu, he goes to format unhide sheet and the magic sheet
pops up. Is there a way of stopping this as well?

Thanks