列出当前网络中可用的SQL server服务器

procedure TForm1.Button1Click(Sender: TObject);
var
SQLServer:Variant;
ServerList:Variant;
i,nServers:integer;
sRetValue:String;
begin
SQLServer := CreateOleObject('SQLDMO.Application');
ServerList:= SQLServer.ListAvailableSQLServers;
nServers:=ServerList.Count;
for i := 1 to nservers do
ListBox1.Items.Add(ServerList.Item(i));
SQLServer:=NULL;
serverList:=NULL;
end;