Hello everyone! I'm just another AOE player, but I want to create a simple mod or something like that, actually, I'm a programmer and I have many years programming in C++ and I have some knowledge about python, but I have no experience about mod development, what should I read or what should I do if I want to learn enough to make a little modification in the videogame like adding a simple technology such as... I don't know... generate trees or something like that?

hi AlbertoWilliams,

There are not much detailed guides to step-by-step moves, but you can find enough information at:
http://www.voobly.com/forum/view/31469
http://www.voobly.com/pages/view/1370/Game%20Mods
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Programing is not need for modding as you use an already made programs with great interface (AGE3, Turtle pack editor), but if you insist in programing, then patching is the thing what you are looking for. More info can be found at UP team's website [You must login to view link]