[NumLock]

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Shape1: TShape;
    procedure Shape1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Shape1MouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure Shape1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
    IsMouseDown: Boolean;
    SaveX: Integer;
    SaveY: Integer;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Shape1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  IsMouseDown:=True;
  SaveX:=X;
  SaveY:=Y;
end;

procedure TForm1.Shape1MouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  if IsMouseDown then
  begin
    Shape1.Left:=Shape1.Left-(SaveX-X);
    Shape1.Top:=Shape1.Top-(SaveY-Y);
  end;
end;

procedure TForm1.Shape1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  IsMouseDown:=False;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  IsMouseDown:=False;
end;

end.

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