Trial version

[VBTricks.de.vu Webmaster]

Hello,

need some help with making a trial version.

Well, creating a key based on the customers email and a random key is
not the problem, but how to avoid a statement like this:

VB:

If CheckForKey Then
' correct key
Else
' test period
End If


With the imediate language this can be easily cracked by de- and
recompiling. I use a obfuscator replacing all names with random values,
so there would not be a CheckForKey function, it would be called like
"A9213". But if a possible cracker debugs it step by step, he surely
will find out which is the right function to comment out. Any advices?

(I know that there will be no way to avoid cracking my app, but I want
to complicate it as much as possible).

Thanks in advance,

Stefan

--
___________________________________www.VBTricks.de.vu
the free resource for Visual Basic, Gambas and Pascal
components, tips & complete projects

www: http://www.VBTricks.de.vu
mail: vbtricks <at> gmx <dot> net
_____________________________________________________

 

[Cor Ligthert [MVP]]

VBTricks,

Giving answers on your question in a newsgroup like this opens as well the
method to crack your program.

Just my thought,

Cor

 

[Carlos J. Quintero [VB MVP]]

http://www.inner-smile.com/nocrack.phtml

--

Best regards,

Carlos J. Quintero

MZ-Tools: Productivity add-ins for Visual Studio .NET, VB6, VB5 and VBA
You can code, design and document much faster.
Free resources for add-in developers:
http://www.mztools.com

 

[VBTricks.de.vu Webmaster]

Thanks,

I know, if someone invented a uncrackable method, he would barely tell
others about it ;-).

Stefan

--
___________________________________www.VBTricks.de.vu
the free resource for Visual Basic, Gambas and Pascal
components, tips & complete projects

www: http://www.VBTricks.de.vu
mail: vbtricks <at> gmx <dot> net
_____________________________________________________