] I need to know how to send song to soneone

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread in the appropriate forum.

Second, did you read the response in the thread you posted. They should have answered your question.

Generally, you can send any file as an attachment to an e-mail. With songs, you have to be conscious of copyright issues as it may be illegal to send someone a copyrighted song.