protecting vba

[inner69923]

i have a vba running in autocad, that calls some dll's in vb6
is there any way of protect the macro for comercial purposes?
can i insert a request code/licensed code dialogue in vba?

[aaronrumple]

Add a password. However, the password isn't that hard to crack, but should deter most.

[inner69923]

thanks for your reply, but... a password is not personal, if you share the vba and the password in p2p nets you have lost your program
i meant one of that codes that make a 'request code' based on some hardware of the computer, so the licensed code is only valid to one computer
can be used in vba?

[aaronrumple]

You can write in a verification system into your VBA. Essentially the code needs to check for some type of key you provide. I've done such a system for a VBA add-on app. The code for setting up a secure licensing scheme can be tedious.

[inner69923]

nice
where can i get some example-code or information to do that?
thanks in advance

[richard.binning]

nice
where can i get some example-code or information to do that?
thanks in advance
There is an Open source locking dll that is freely available...I'll try to dig up a reference to it and post here.

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[inner69923]

There is an Open source locking dll that is freely available...I'll try to dig up a reference to it and post here.
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thanks, that dll will be useful for me