Take a look at:

application.EnableCancelKey

in VBA's help.

Read the warning in there about a "runaway" loop.

François wrote:

Hello,

Is there a way to avoid the user to stop the process of a macro.
The reason for this is very simple : in the macro the sheet is deprotected
at the beginning and reprotect at the end. Therefore to avoid the user to
find a unprotected sheet whenever he stops the macros, I would like to set
the unbreakable switch to on.

Many thanks for your valuable help.

François

--

Dave Peterson