how to put some information to the user when creating an function

hi i would like to make the creation of my function more informative. ex.:

here is an function

Public Shared Function CountUserPictures(byval viduser as integer) as integer
begin
   .....
end

this functions is good, but when i am programming on visual studio. all functions show a Little comment when we type it. like this function above could show. an message or tip to the user when he is typing on visual studio like this:

this function return the number of photos the user uploaded on his account.

how can i do that?