functions in the main form and their features

Functions created and editted by Minhaz:

pingUsers(object addr)

arguments: object type, the base IP address of the LAN

return type: void

**task: ** get the base IP address and pings all other ip address in a loop from base.1-255 and waits for the reply

void p_PingCompleted(object sender, PingCompletedEventArgs e)

event handler called when a ping reply is recieved

populateUserList()

arguments: no arguments

return type: void

**task: ** read the list of online users from tmp file and populate the list of online users as well as refreshes the arraylist