Компонент PowerControl

Code:

unit PowerControl;

interface

uses WinTypes, WinProcs, Messages, SysUtils, Classes, Controls,

    Forms, Graphics, MMSystem;

type

  TAction = (actLogOFF,actShutDown,actReBoot,actForce,actPowerOFF,

actForceIfHung,actMonitorOFF,actMonitorON,actCDEject,actCDUnEject);

type

TPowerControl = class(TComponent)

   private

       FAction : TAction;

       procedure SetAction(Value : TAction);

   protected

   public

       function Execute : Boolean;

   published

       property Action : TAction read FAction write SetAction;

end;

procedure Register;

implementation

procedure Register;

begin

    RegisterComponents('K2', [TPowerControl]);

end;

procedure TPowerControl.SetAction(Value : TAction);

begin

    FAction := Value;

end;

function TPowerControl.Execute : Boolean;

begin

   with (Owner as TForm) do

      case FAction of

        actLogOff: ExitWindowsEx(EWX_LOGOFF,1);

        actShutDown: ExitWindowsEx(EWX_SHUTDOWN,1);

        actReBoot: ExitWindowsEx(EWX_REBOOT,1);

        actForce: ExitWindowsEx(EWX_FORCE,1);

        actPowerOff: ExitWindowsEx(EWX_POWEROFF,1);

        actForceIfHung: ExitWindowsEx(EWX_FORCEIFHUNG,1);

        actMonitorOFF: SendMessage(Application.Handle,

                       WM_SYSCOMMAND, SC_MONITORPOWER, 0);

        actMonitorON: SendMessage(Application.Handle, WM_SYSCOMMAND,

                      SC_MONITORPOWER, -1);

        actCDEject: mciSendstring('SET CDAUDIO DOOR OPEN

                    WAIT',nil,0, Handle);

        actCDUnEject: mciSendstring('SET CDAUDIO DOOR CLOSED

                      WAIT',nil,0, Handle);

      end; {Case}

   Result := True;

end;

end.