[Guy Harris <guy@xxxxxxxxxxxx>]

On Jan 30, 2008, at 5:46 PM, dxf206_163 wrote:

>    I'm newer. I want to define new filter, but i can't find out save  
> button
> in "display filter" dialog,

There isn't one.  Clicking "OK" causes all changes you've made,  
including adding new filters, to be saved.

> and in "capture filter" dialog, i also can't
> find out exprension button.

There isn't one.  For information on the syntax of capture filters, see

	http://www.tcpdump.org/tcpdump_man.html

or

	http://www.winpcap.org/docs/docs_41b2/html/group__language.html

(look for "expression").