Tekla Open API: How to create an app that creates drawings

I need exact data tekla api and how to develol

useless tutorial

You should start a tutorial series explaining <<every API Reference>>. There are thousands of AutoCAD users that can customize/program AutoCAD. But very few Tekla user that can program their tekla. Timble is developing Tekla nicely. But you can not satisfy all the users on this earth. So you should make the programming easier to the users...

Didn't understood much of it but was able to get it working, thanks for sharing this tutorial.
Is there any good book on learning these codes and methods? Thank you

I need the source code.