处理窗口的WM_MOVEunit Unit1;interfaceuses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
    procedure WMMove(var msg:TWMMove);message WM_MOVE;
  public
    { Public declarations }
  end;var
  Form1: TForm1;implementationuses Unit2;{$R *.dfm}procedure TForm1.WMMove(var msg: TWMMove);
begin
  inherited;
  if Assigned(Form2) then
    if Form2.Visible then begin
      Form2.Left:=Left+Width;
      Form2.Top:=Top;
    end;
end;procedure TForm1.Button1Click(Sender: TObject);
begin
  Form2.Show;
end;end.