Are there some tips to find useless header files?

[gan_xiao_jun@yahoo.com]

Are there some tips(script or command lines) to find
useless header files in c or cpp files?

For example:
vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
#include <useful1.h>
...
#include <useless.h>//<===how to find it by script
...
#include <useful2.h>

main()
{
...
}
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Thanks in advance
gan


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com