hi sir how to success the usb.in transfer function in arduino for usb devices....
It's not at all clear to me what you're asking. I think you'll have a much better chance of getting a useful answer if you take the time to add some details.
It is clear that English is not your native language. The forum has sections for several common non-English languages. You might find it easier to post in the section for your native language if we have one. If not, well, Google Translate does a decent job translating to English so it's still no excuse for not providing details.
I've deleted your other cross post @DSMohan.
Cross posting is against the rules of the forum. The reason is that duplicate posts can waste the time of the people trying to help. Someone might spend 15 minutes writing a detailed answer on this thread, without knowing that someone else already did the same in the other thread.
Repeated cross posting will result in a suspension from the forum.
In the future, please take some time to pick the forum section that best suits the topic of your question and then only post once to that forum section. This is basic forum etiquette, as explained in the sticky "How to use this forum - please read." post you will find at the top of every forum section. It contains a lot of other useful information. Please read it.
Thanks in advance for your cooperation.
It seems you either ignored my advice from my previous reply, or simply didn't bother to read it at all. Either way, I don't see what you're hoping to accomplish here. It seems like you're just wasting our time and yours both. Make a little bit more effort here and you'll actually get something out of it.