<p>i have robot and want to control it via internet using radio wave .. but still i dont know the best language to do that . with the need to build scure site to insure not any body can use it . i expect for site asp with c# but what is the language i'll need it to control from sender device to the recipt robot . also need to live video transfer to the site from robot camera............
soory for bothering .....i know it may wrong but i'm beginner </p>

<p>and thanks for all who read or try to help me</p>

I think it might be best to narrow down your choice of technologies before choosing a programming language. Robotics control can be a very complex topic, and there are many approaches to solving the same problem.
Having said that, with the components you've listed:
Secure internet interface
RF communication to an autonomous robot
Embedded robot control software
Video processing, compression and decompression
Display of video to internet visitors
I would guess that your complete solution would involve at least two or three different programming languages, depending on application and environment.