Can anyone give me the name ?

I can't succeed to send my  picture of 100 ko ? can anyone help me ?

Have you read the section which covers this. You can read it at Image Hosting Service 

If you then have problems, please tell us where they occur, and then we can help.

Thank you Chris, let's try it : sorry, I tried several times and it failed. maybe I did quite understant how it works.

How far did you get? 
Did you get to the box with 3 link options? 
You might need to actually highlight and copy the link from it, and then paste it into the message. Just clicking on the Copy button may not actually do the copying. I think it depends on which browser you are using, and the version of it.