How BDCDATA works

[kumarangopi]

Today my class was with BDC in ABAP
My sample program was to insert records into database from external excel file .Part of the code was:
Data:ptable type table of bdcdata with header line
Form Screen tables wtable structure bcddata using wprog wdynp wynb
wtable-program = wprog.
wtable-dynpro = wdynp.
wtable-dynbegin = wynb.
append wtable.
clear wtable.
endform
call transaction se11 using ptable mode 'N'
perform screen tables ptable using 'sapmsrd0' '102' 'x'
My doubt is how screen navigation in BDC works ie in ptable we are just adding records through passed parameters and we are calling transaction se11 with ptable.Does it mean to say that the screen moves as per screen number in each record in ptable.se11 starts moving with first record and ends in last record screen number.
So If we add a record in a table (which is of type bdcdata) and pass it to call transaction statement,all the screens in that table will be visited.
Am I understanding it in correct way?
Thanks in advance