> Maybe there is insufficient memory, the return is error,
> Do we need to check the return ?

  It'll abort if there is not enough memory.
  http://mail.gnome.org/archives/gtk-app-devel-list/2003-September/msg00260.html

Regards,
chenwj

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj

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