Read out Edit / EditBox from another application even if it says: "*****"

Problem/Question/Abstract:

How to read out Edit / EditBox from another application even if it says: "*****"

Answer:

unit
  Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls, ComCtrls;

type
  TForm1 = class(TForm)
    Timer1: TTimer;
    Panel1: TPanel;
    StatusBar1: TStatusBar;
    // Procedures
    procedure FormCreate(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);

  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  bQuit: Boolean;

implementation

{$R *.DFM}

//--------------------------------------------------------------------

procedure TForm1.FormCreate(Sender: TObject);

begin
  // Init Bo
  bQuit := False;

  // Init timer
  Timer1.Interval := 250;
  Timer1.Enabled := True;

end;
//--------------------------------------------------------------------
procedure TForm1.Timer1Timer(Sender: TObject);

var
  pP: TPoint;
  iX, iY: Integer;
  iOldX, iOldY: Integer;
  iL: Integer;
  aBuf: array[0..255] of Char;
  hH, hOldH: THandle;
  hH1: Thandle;

begin
  // Timer off
  Timer1.Enabled := False;
  iOldX := 0;
  iOldY := 0;
  hOldH := 0;
  repeat
    // Let windows do his job(s)
    Application.ProcessMessages;
    // Get position of cursor on screen
    GetCursorPos(pP);
    // Convert to X and Y value
    iX := pP.x;
    iY := pP.y;
    // Get the handle of the component under the cursor
    hH := WindowFromPoint(pP);
    // Get the handle of the child (if any)
    hH1 := ChildWindowFromPoint(hH, pP);
    if hH1 <> 0 then
      hH := hH1;

    if (iOldX <> iX) or (iOldY <> iY) then
      if hH <> hOldH then
      begin
        if hH <> Panel1.Handle then
        begin
          GetClassName(hH, aBuf, SizeOf(aBuf));
          Form1.Panel1.Caption := 'Class: ' + StrPas(aBuf);
          // Show the classname in the label
          iL := SendMessage(hH, WM_GETTEXT, SizeOf(aBuf), longint(@aBuf));
          // If length of line > 0 then show the line in the Label
          if iL > 0 then
            Panel1.Caption := 'Text: "' + StrPas(aBuf) + '"';
        end
        else
          Panel1.Caption := 'Get me the password!';

        // Save old x, y, h values
        hOldH := hH;
        iOldX := iX;
        iOldY := iY;
      end;
  until bQuit;
end;
//--------------------------------------------------------------------

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);

begin
  // Quit the repeat loop on close
  bQuit := True;
end;
//--------------------------------------------------------------------
end.
//====================================================================