Quoted from Chip Pearson's site................

The security just isn't strong enough to provide real protection of
proprietary information or information or code with intellectual property
value. For that level of security, you should be writing your code in Visual
Basic 6 or VB.NET. See Creating A COM Add-In for details about creating a
COM Add-In and Automation Add Ins A Function Libraries for details about
creating an Automation Add-Ins.

http://www.cpearson.com/excel/workbooktimebomb.aspx

The links in the quote are found at the site.


Gord Dibben MS Excel MVP


On Sat, 3 Jan 2009 19:13:15 +0000, Keyrookie
wrote:


Hey all,

I'm wanting to sell a workbook I've designed. I've spoken with several
folks that told me I would need to have all my work re-programmed and
written as a stand alone executable program because Excel is impossible
to protect. Is there any solution beyond the step I just mentioned? Is
there a "shell" prg that would protect a workbook? I know technology is
changing all the time so I thought I would ask.

Thanks for your thoughts,

K