How to write a new block in Gnu radio

[aamer]

i have never use the gnu radio before i need help that how to write the block i hace fallow the manual of gnu radio that how to writr a block but it give some error so kindly please help me

[Karl Berry]

    Subject: How to write a new block in Gnu radio

You need to write to a GNU Radio mailing list; I guess
discuss-gnuradio@....  Good luck ...