what is railway API of INdian Railway........

I guess pnrstatusbuzz.in is also using some kind of Railway API. It would be really helpful if you contact them and ask them for help. I hope they can guide you in this regard.

but sir ,  i m developing an application to book ticket on line in window application....

hi,

I don't think so they are giving any api.


for pnr some unofficial Api are available.

refer to this link:
http://pnrapi.alagu.net/