>This is a way around that will keep most user to suspect anything if the files are names wisely. Good idea. Thank you.
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>But still, the reason I asked that is because I use this application as a demo. This demo is available to my possible clients that want to evaluate our software. This is why I don't want them to print because they will be able to use it whitout buying it. Sure I have other protection that will protect my application but this is the only one that tickles me.

My way of demoing is to have all the options active, including printing - only to limit the number of records in the tables. Another thing is that all the reports include user's company name in the top left, and in the case of a demo version, the company name is "Demo version". So they may print it as much as they like.