My pc is a part of a local ethernet and have access to the internet via a proxy server. Whith windows the things are simple : Static ip adress, gateway adress ,netmask adress, and DNS adress in network properties, and the proxy server domain name and port in internet explorer. After install slackware 9 can't see even the local network workgroups and shared files. I try , netconfig, ifconfig, proxy setings in the internet html browser,network proxy in gnome preferences and then i heart about samba. I have to run samba to have access to the local network ? It is samba necesary for the internet connection? What i have to do ? Please help.....

Samba is not necessary for your network connection. What Samba does is allow you to share files on your Linux box with other (windows) boxes on your network.
Now... back to your current problem. A little more information would help.
Please post the output of ifconfig.
Do you know if the modules for your NIC are being loaded at boot? What kind of NIC is it?

make sure your network already configure.

and test your connection using ping to the proxy server, if reply you already to setting the internet connection.

to see another computer on your network using samba, you have to mount the remote computer manually. If you using window manager, you can use LinNeighbourhood (download from www.freshmeat.net).

here command to configure your client (just for example)

ifconfig eth0 up // activate your ethernet
ifconfig eth0 192.168.0.2 netmask 255.255.255.0 //asume your ipaddr
route add 192.168.0.2 gw 192.168.0.1 //assume your gateway ipaddr

edit your /etc/resolv.conf, put your DNS server your network, example :

nameserver 202.155.0.10
nameserver 202.152.0.2

last, set your browser, put the proxy server ipaddr and port, and test your internet connection.

maybe this resolve your problem

thx