'returns 1 if wait for link was 
'chosen, otherwise 0
function server
 dim ser
 dim k
 ser=1
'draw flash
 line -60,35,-60,-35
 line 53,35,53,-35
 line -60,35,53,35
 line -60,-35,53,-35

 line -62,37,-62,-37
 line 55,37,55,-37
 line -62,37,55,37
 line -62,-37,55,-37

 line -60,15,53,15

'print inscription
 printxy -50,30,"MINIBATTLESHIP"
 printxy -17,0,"Wait"
 printxy -21,-15,"Invite" 
 printxy -34,0,">"
 printxy 20,0,"<"
 k=0
'choose wait for link or 
'connect
 while k<>272
  k=0
  while k=0
   k=key
  wend
'if key <Down> is pressed,
'move the cursor down
  if k=267 then
   ser=0
'delete cursor from the old 
'place
   ink 0
   printxy -34,0,">"
   printxy 20,0,"<"
'draw cursor on the new place
   ink 3
   printxy -34,-15,">"
   printxy 20,-15,"<"
  else
'if key <Up> is pressed, move 
'the cursor up
   if k=265 then
    ser=1
'delete cursor from the old 
'place
    ink 0
    printxy -34,-15,">"
    printxy 20,-15,"<"
'draw cursor on the new place
    ink 3
    printxy -34,0,">"
    printxy 20,0,"<"
   end if
  end if
 wend
 server=ser
end function

'connection 
sub connect(byref id_dev as long)
 dim com as int
 dim tmp as long
'choose partner
 id_dev=select()
'send request
 if id_dev=0 then
  exit sub
 end if
 for i=1 to 10
  post id_dev,1,100,100,tmp
 next
'wait for replay
 while com<>2
  receive id_dev,com,tmp,tmp,tmp
 wend
end sub

'wait for link
sub waitcon(byref id_dev as long)
 dim com as int
 dim tmp as long
 cls
'print the message
 printxy -45,10,"Wait for link..."
'wait for request
 while com<>1
  receive id_dev,com,tmp,tmp,tmp
 wend
'send replay
 for i=1 to 10
  post id_dev,2,100,100,tmp
 next
end sub