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. 
