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var i:THandle;
begin
 repeat
  i:=FindWindow( ); // Mein Tool hab ich gerade nicht bei
  SetWindowPos(i,0,0,0,0,0,SWP_NOSIZE or SWP_NOZORDER);
 until i=0;
end;                    

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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    ListBox1: TListBox;
    Timer1: TTimer;
    procedure Timer1Timer(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  fenster:TStringList;

implementation

{$R *.dfm}

procedure TForm1.Timer1Timer(Sender: TObject);
begin
if (listbox1.itemindex>-1)then
           SetWindowPos(strtoint(fenster[listbox1.itemindex]), 0, 10, 10, 0, 0, SWP_NOZORDER or SWP_NOSIZE);
end;

procedure TForm1.FormCreate(Sender: TObject);
var h:HWND;
var buf:Array[0..1024]of char;
begin
fenster:=TStringList.create;
           h:=handle;
           while h>0 do
           begin
               if (iswindowvisible(h))then begin  getwindowtext(h,@buf,sizeof(buf)); listbox1.items.add(inttostr(h)+'-'+buf);  fenster.Add(inttostr(h));  end;
               h:=getnextwindow(h,GW_HWNDNEXT);
           end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
form1.FormCreate(self);
end;

end.