unit Unit1;

interface

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

type
  TfrmMain = class(TForm)
    Image1: TImage;
    procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Image1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    { Private declarations }
//    procedure WMNCHITTEST(var M:TWMNCHITTEST); message WM_NCHITTEST;
  public
    { Public declarations }
  end;

var
  frmMain: TfrmMain;

implementation

{$R *.dfm}

procedure TfrmMain.FormMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  ReleaseCapture;
  SendMessage(self.Handle, WM_SYSCOMMAND,SC_MOVE+HTCAPTION, 0);
end;

//procedure TfrmMain.WMNCHITTEST(var M:TWMNCHITTEST);
//begin
//    inherited;
//    if M.Result=HTCLIENT then
//    begin
//       M.Result:=HTCAPTION;
//    end;
//end;
procedure TfrmMain.Image1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  ReleaseCapture;
  SendMessage(self.Handle, WM_SYSCOMMAND,SC_MOVE+HTCAPTION, 0);
end;

end.