How to refresh taglist in vim?

When I make a change to a file, for example, add a function, how can I make the taglist automatically update the "tag list" in its windows after I save the change?

From stackoverflow

• I adapted my setup from the C++ code completion vim tip.

  map <C-F12> :!ctags -R --c++-kinds=+p --fields=+iaS --extra=+q .<CR>
  

  When needed, I press Ctrl-F12 to regenerate tags.

  If you're using vim-taglist, you could add to your .vimrc an autocommand for the BufWritePost event to update the taglist window after every save:

  autocmd BufWritePost *.cpp :TlistUpdate
  

  Gautam Borad : Minor correction. The key-combination will be `Ctrl-F12` and not `F12` as mentioned by you.

  Greg Bacon : Thanks! Fixed and added more info.

• Haven't tested, but you could try something like:

  au BufWritePre     *.cpp ks|!ctags %
  

  Which basically executes ctags when the buffer for a file ending in .cpp gets saved(:w).

• I did write a little experimental script that automatically and incrementally updates, the "current" tags file on file saving.

  (The question is actually redundant with http://stackoverflow.com/questions/155449/vim-auto-generate-ctags )