jfernandope wrote:
may be for somebody is easy but for me really is imposible.
Why do you need to do it, if it's beyond your abilities ? Are you being paid for a job that you're not capable of ? Or is this for school ?
either way, how to use Crystal is widely documented. You should follow an online tutorial and ask us for specific help when you get stuck. A forum reply is not going to give you the detail that an online article is.