See also
http://www.cpearson.com/excel/vbe.htm


--
Regards Ron De Bruin
http://www.rondebruin.nl



"Ron de Bruin" wrote in message ...
Have you try my code example Frans ?

--
Regards Ron De Bruin
http://www.rondebruin.nl



"Frans Verhaar" wrote in message ...
I am not afraid of that.
The fact that they hire me to write this relatively simple code, means that they will probably not be able to crack it
themselves, let alone receive any additional support from me...

However,
Is there not a code that on a workbok open event can delete all code in VBA when it is past a certain date, and than save the
workbook immediately?

It is like an auto destruct. How would I formulate such an auto delete of code / modules?

Regards,
Frans



"RB Smissaert" wrote in message ...
Simplest way to make it foolproof is put some or most of the code in a VB6 ActiveX dll and
make all the functions/subs exit with a message when it is past the date.
Any protection that relies on VBA code is very easy to crack.

RBS


"Frans Verhaar" wrote in message ...
Hi,

I am writing a little VBA application and will sell this to a small company.
However, I want to give them a license to use it only for 3 months.
How can I make sure the application will not work anymore after 3 months?

And how can I program something that will clear the whole VBA code if somebody tries to break into the code?

Regards,
Frans