hostEnt := gethostbyname (hostName);
if Assigned (hostEnt) then
if Assigned (hostEnt^.h_addr_list) then begin
addr := hostEnt^.h_addr_list^;
if Assigned (addr) then begin
IP := Format ('%d.%d.%d.%d', [byte (addr [0]),
byte (addr [1]), byte (addr [2]), byte (addr [3])]);