As an active member of the EVE Technology Lab forum, I read a lot of posts regarding how to use API functions, how to query the data dump, and so on. Until now, there has been no "complete" tutorial about such things, so you had to figure it out yourself, or anoy other devs who already figured it out themselves.
With this tutorial I want to give people a simple introduction on how to use the API functions and the data dump, so that the most basic questions are answered, or can be answered by yourself.
The links on the right side are also available on the official EVE forum as a sticky.
Set up a local environment on windows using XAMPP and install the Static Data Dump. After that you have everything to get started.
Request some basic data from the API and make sure the given API credentials work.
Use a library to request more complex data from the API.
The data from the API comes often as numbers. Use the static data dump to find out, what those numbers mean.