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function FindRootNode(ACaption: String; ATreeView: TTreeView): TTreeNode;
var LCount: Integer;
begin
  result := nil;
  LCount := 1;
  while (LCount < ATreeView.Items.Count) and (result = nil) do
  begin
   //  tvChannels.FullExpand;
    if (ATreeView.Items.Item[LCount].Text = ACaption) and (ATreeView.Items.Item[LCount].Parent = nil) then
      result := ATreeView.Items.Item[LCount];
    inc(LCount); 
  end; 
end;

 procedure TForm1.Button3Click(Sender: TObject);
var
  err_srv,err_init,anz:integer;
  host,ip,ip2:string;
  dtr,rts:boolean;
  ChannelsInfo : Array[0..1024] of TtsrChannelInfo;
  Records : Integer;
  I: Integer;
  p: integer;
  server:TtreeNode;
  serverinfo:ttsrserverinfo;
  players: Array[0..1024] of Ttsrplayerinfo;
  channel: TTreeNode;
begin
try
tsrgetplayers(@players,@anz);
except
showmessage('ERROR');
end;
 try
err_init:=tsrGetChannels(@ChannelsInfo, @records);
except
if not (err_init = 0) then
showmessage('ERROR');
end;
     tsrgetserverinfo(@serverinfo);
    tvchannels.Items.Clear; { Vorhandene Knoten entfernen }
   server := tvchannels.Items.Add(nil,serverinfo.ServerName);
  server.ImageIndex := 3;
  server.SelectedIndex:= 3;
    if Records > 0 then
 for I :=1 to Records -1 do begin
if ChannelsInfo[I].ChannelParentID = -1 then begin
tvChannels.FullExpand;
tvchannels.Items.AddChild(nil,ChannelsInfo[I].Name);
tvchannels.Items.Item[i-1].ImageIndex:=2;
tvchannels.Items.Item[i-1].SelectedIndex:=2;

for p :=0 to anz -1 do begin
if players[p].ChannelID = ChannelsInfo[I].ChannelID then
begin
 tvChannels.FullExpand;
channel:=findrootnode(ChannelsInfo[I].Name,tvchannels);
tvchannels.Items.AddChild(channel,players[p].NickName);
tvchannels.Items.Item[i].ImageIndex:=1;
tvchannels.Items.Item[i].SelectedIndex:=1;
end;
end;