[Discuss-gnuradio] Help in . dat file and desig blocks in gnuradio

[Mohammed Ramadan]

i want your help in gnu-radio program as i make RF application using USRPN210. And want to know:
 1- How to write code for designing specific block (which language can I use?.  And how can i see this block in gnu-radio blocks?).

2-How to make .dat file, to use it with signal source file in gnu-radio program to do specific application.
Kindly help me As soon As Possible.

Thanks