Add Console Input and Output for a GUI Delphi Application

If you want to have console input/output for GUI applications you should use the AllocConsole and FreeConsole functions.

The AllocConsole function allocates a new console for the calling process. The FreeConsole function detaches the calling process from its console. Here's the example:

var
   s: string;
begin
  AllocConsole;
  try
    Write('Type something and press [ENTER]') ;
    Readln(s) ;
    ShowMessage('You typed ' + s) ;
  finally
    FreeConsole;
  end;
end;

Note: "pure" console applications are pure 32-bit Windows programs that run without a graphical interface. When a console application is started, Windows creates a text-mode console window through which the user can interact with the application.

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