>>>Let's call it a fifty dollar program for the public to use, How do I protect it from most pirates?
>
>You can use defox to require a key and also prevent your app being hooked out of memory or decompiled to discover your protection scheme. Defox's protection is written in ASM and needs a Journeyman hacker to pick apart.
>
>And/or you can add VFP Compiler to make it simply not worthwhile trying to break your protection.
>
>Defox is free, VC costs a few hundred $.

I get this when I a opening the program:
Potentially Unsafe File

A file that you are opening is of a potentially unsafe type. The name of the potentially unsafe file is shown in the dialog. Before opening this file, you should carefully consider its source and whether or not the archive contents are trusted.

Click Yes if you trust the archive and wish to continue to open this file. Click No to cancel opening the file.

If you do not wish to see this warning for this specific file type in the future, check the box labeled Do not display this dialog in the future when opening .ext files, where .ext is the extension of the file being opened.

See also:

Potentially Unsafe File Types