In my earlier post I have given brilliant flow chart that help you understand quickly the program flow.
EZTP key statements i have given few here. I will give some more in my next posts.
CALL PGMNAME USING (FIELDA, FIELDB, FIELDC)
Description: PGMNAME= program name, FILEDA, FILEDB, FILEDC ARE WORKING STORAGE GROUPS.
Description: It restores value of working storage fields to initial state
LABEL The max length is 40 chars. Example: data names, Proc names etc 8 Char length for FILE names etc
Grab complete program structure here. This chart gives basic idea about program.