To develop a post, you must create an event handler and a definition file. The recommened method to create these is with Postbuilder. After creating a post, you will have three files: <post_name>.tcl, ~.def, and ~.pui.
The PostBuilder documentation is included in the Postbuilder kit and accessed from within Postbuilder.
In order for a post to be available in NX, you must enter the name of the post and the locations of the Event Handler and definition file into the post configuration file, usually template_post.dat. This is pointed to by the entry TEMPLATE_POST in your CAM Configuration file.