How do I write my own Pd externals (or [objects])?
Up to Table of ContentsThis FAQ applies to: Any version.
For once there is the a short how-to write externals by IOhannes m zmölnig.
There is also some documentation for writing new Pd objects in a paper by Theo Stojanov.
Also, the API for Max/MSP and Pd is almost identical, so if you find documentation on writing MSP externals, it may be of use.