学步园

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Memo1: TMemo;
    Button1: TButton;
    Button2: TButton;
    procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X,
      Y: Integer);
    procedure FormMouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure FormMouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  MousePressTag : Boolean;
  Oldx : integer;
  Oldy : integer;
implementation

{$R *.dfm}

procedure TForm1.FormMouseMove(Sender: TObject; Shift: TShiftState; X,
  Y: Integer);
begin
  if   MousePressTag then
       begin  //如果要获得和Windows的Form移动完全一样的效果，
              //你可以在这儿画虚框，这好象就不难了。
         left:=left+x-Oldx;
         Top:=Top+y-Oldy;
         oldx:=form1.Left;//form位置改变后，必须重新保存！
         oldy:=form1.Top;
         end;
end;

procedure TForm1.FormMouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
 MousePressTag := True;
  Oldx:=x;
  Oldy:=y;

end;

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

procedure TForm1.Button1Click(Sender: TObject);
begin
   SendMessage(Memo1.Handle,WM_KeyDown,VK_Next,0);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
   SendMessage(Memo1.Handle,WM_KeyDown,VK_PRIOR,0);
end;

end.