where we can place our customization code

hi,



could anyone tell me please…



where we can add our customize code as after upgrade to new version of cs-cart, we don't want to roll back or disturb our customize code and also we hate to code again and again for same purpose…



e.g



we want to integrate using Address Validation Street Level API of ups with cs-cart for validation and for this i need to write some custom code for client end means front end and after new upgrade my customize code should not be roll back/delete/disturb…Is this possible.



Or Tell me any special place or file where i write and use my custom coding…

Hello!



To avoid such problems in the future we would recommend you to make all customizations as add-ons (separate programming modules).



Best regards, Alt-team

could you provide any reference guide for help about customizations as addons

[quote name='doc1' timestamp='1326281090' post='129194']

could you provide any reference guide for help about customizations as addons

[/quote]



There are some info here: