Hi Shu,

User can press
Ctrl+Break to go into to the VBA editor environment, which
is not supposed to happen.

1) use
Application.EnableCancelKey = xlDisabled
at the beginning of your code to avoid ctrl+break

2) hide your vba modules and protect them with a password
vba-editor, menu extras/properties of vba-project/protection

activate the field and enter a password there. This is _no_ absolute
protection, however, you cannot do more.

regards

arno