>>how I can do to protect the code of a class that alone I could see.
>>that if I give them the lessons to anybody this person could not see the codes
>
>The source code is stored in one memo field, the compiled version in another. You can make a backup, and then:
>
>

>use MyLib.vcx
>replace all methods with ""
>

>
>Don't forget the backup.


That will not really protect it. The code in the memo field that is compiled is just like an FXP, which means that it can be decompiled like any other unprotected FXP!