You should specify the crypto provider to use because default one is different under different version of Windows.

cProviderName = "Microsoft Base Cryptographic Provider v1.0"

>I am using the class of fox _ crypt.vcx. With it I obtain to criptografar my archives and have functioned perfectly, only that when I criptografo an archive I only obtain later to decriptografar it if I will be in a machine that has operational system the same when this archive was criptografado.
>
>Example: If to criptografar in the Windows 98 alone I obtain to descriptografar in a station with Windows 98.
>
>How I can decide this question a time that I possess customers with windows 95/98/NT/2000/XP? I could generate a version for each one of these systems, but this torná impracticable. He also can be that they alguem has other solutions to criptografar/descriptografar. One more time story with the aid of voces and since already I am thankful all.
>
>Lazaro Santos.