Создание DBExpress-Connection в runtime

procedure TVCLScanner.PostUser(const Email, FirstName, LastName: WideString); 
var 
  Connection: TSQLConnection; 
  DataSet: TSQLDataSet; 
begin 
  Connection := TSQLConnection.Create(nil); 
  with Connection do 
  begin 
    ConnectionName := 'VCLScanner'; 
    DriverName := 'INTERBASE'; 
    LibraryName := 'dbexpint.dll'; 
    VendorLib := 'GDS32.DLL'; 
    GetDriverFunc := 'getSQLDriverINTERBASE'; 
    Params.Add('User_Name=SYSDBA'); 
    Params.Add('Password=masterkey'); 
    Params.Add('Database=milo2:D:\frank\webservices\umlbank.gdb'); 
    LoginPrompt := False; 
    Open; 
  end; 
  DataSet := TSQLDataSet.Create(nil); 
  with DataSet do 
  begin 
    SQLConnection := Connection; 
    CommandText := Format('INSERT INTO kings VALUES("%s","%s","%s")', 
      [Email, FirstN, LastN]); 
    try 
      ExecSQL; 
    except 
    end; 
  end; 
  Connection.Close; 
  DataSet.Free; 
  Connection.Free; 
end;

Взято с https://delphiworld.narod.ru