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[Luckie]

Delphi-Quellcode:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
  private
    { Private-Deklarationen }
  protected
    procedure WMLButtonDown(var msg: TMsg); message WM_LBUTTONDOWN;
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.WMLButtonDown(var msg: TMsg);
begin
  SetCursor(LoadCursor(0, IDC_SIZEALL));
  SendMessage(Handle, WM_NCLBUTTONDOWN, HTCAPTION, msg.lParam);
end;

end.