unit CPower;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormPaint(Sender: TObject);
private
{ Private declarations }
procedure WMPowerBroadcast(var message: TMessage);
message WM_POWERBROADCAST;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
{ TForm1 }
procedure TForm1.WMPowerBroadcast(var message: TMessage);
const SkipNextPowerMsg:boolean=True;
begin
//我发现系统是连发两次这个消息，所以要跳过一个消息
if SkipNextPowerMsg then
begin
SetForegroundWindow(Self.Handle);
if Application.MessageBox('是否关闭系统？','警告',MB_OKCANCEL + MB_DEFBUTTON2)<>IDOK then
begin
message.Result := BROADCAST_QUERY_DENY;
SkipNextPowerMsg:=not SkipNextPowerMsg;
end
else
Close;
end
else
SkipNextPowerMsg:=not SkipNextPowerMsg;
end;
procedure TForm1.FormPaint(Sender: TObject);
begin
Self.Visible:=False;
end;
end.
