Drag&Drop ohne boarder?

[suni]

Ich habe mithilfe eines users ein kleines tool erstellt um zu prüfen ob ein mutex present ist.
Der fehler scheint hier zu liegen:

Delphi-Quellcode:

Procedure TForm1.FormMouseDown[color=#00FF00]fehler[/color](Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
Begin
   ReleaseCapture;
   Form1.Perform(WM_SYSCOMMAND, $F012, 0);
End;

Hier mal mein Source

Delphi-Quellcode:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, ComCtrls, TFlatProgressBarUnit,
  TFlatMemoUnit, TFlatButtonUnit, jpeg;

type
  TForm1 = class(TForm)
    Button1: TButton;
    ProgressBar1: TProgressBar;
    Image1: TImage;
    cap: TShape;
    bclose: TFlatButton;
    babout: TFlatButton;
    bmin: TFlatButton;
    FlatButton1: TFlatButton;
    FlatMemo1: TFlatMemo;
    FlatButton2: TFlatButton;
    FlatButton3: TFlatButton;
    FlatProgressBar1: TFlatProgressBar;
    Button2: TButton;
    procedure FlatButton1Click(Sender: TObject);
    procedure FlatButton3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure bcloseClick(Sender: TObject);
    procedure baboutClick(Sender: TObject);
    Procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);


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

var
  Form1: TForm1;

implementation

uses Unit2, Unit3;

{$R *.dfm}


procedure TForm1.FlatButton1Click(Sender: TObject);

var

  hmutex: THandle; begin
   FlatButton1.enabled := false;
  hmutex := CreateMutex(NIL, FALSE, 'mutexname');
  if (hmutex = 0) OR (GetLastError = ERROR_ALREADY_EXISTS) then
  MessageBox(0, 'mutex is found =)', 'mutexsearch', MB_ICONINFORMATION)

else

MessageBox(0, 'mutex is not present', 'mutexsearch', MB_ICONINFORMATION);


end;


procedure TForm1.FlatButton3Click(Sender: TObject);
begin
 form2.Show;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
form3.Show;
end;

procedure TForm1.bcloseClick(Sender: TObject);
begin
close;
end;

procedure TForm1.baboutClick(Sender: TObject);
begin
 form3.Show;
end;

   Procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
Begin
   ReleaseCapture;
   Form1.Perform(WM_SYSCOMMAND, $F012, 0);
End;
end.