Code
function GetComputerNetName: string; 
 var 
   buffer: array[0..255] of char; 
   size: dword; 
 begin 
   size := 256; 
   if GetComputerName(buffer, size) then 
     Result := buffer 
   else 
     Result := '' 
 end;
 Code
idftp1.MakeDir(GetComputerNetName); 
 idftp1.ChangeDir(GetComputerNetName);