unit uFrmSysCtrl;

interface

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

type
  TFrmSysCtrl = class(TForm)
    rdgResolution: TRadioGroup;
    btnResolution: TButton;
    rdgExitWin: TRadioGroup;
    btnExitWin: TButton;
    btnClose: TButton;
    procedure btnResolutionClick(Sender: TObject);
    procedure btnExitWinClick(Sender: TObject);
    procedure btnCloseClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  FrmSysCtrl: TFrmSysCtrl;

implementation

{$R *.dfm}

procedure TFrmSysCtrl.btnResolutionClick(Sender: TObject);
var 
  lpDevMode: TDeviceMode;
  X, Y: Integer;
begin
  case rdgResolution.ItemIndex of
    0: begin X := 1280; Y := 960; end;
    1: begin X := 1024; Y := 768; end;
    2: begin X := 800;  Y := 600; end;
    else begin X := 640; Y := 480; end;
  end;
  lpDevMode.dmFields := DM_PELSWIDTH Or DM_PELSHEIGHT;
  lpDevMode.dmPelsWidth := X;
  lpDevMode.dmPelsHeight := Y;
  if ChangeDisplaySettings(lpDevMode, 0) <> DISP_CHANGE_SUCCESSFUL then
    RaiseLastOSError;
end;


procedure TFrmSysCtrl.btnExitWinClick(Sender: TObject);
var
  hToken : THandle;
  tkPriv : TTokenPrivileges;
  Zero   : DWORD;
begin
  OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY, hToken);
  LookupPrivilegeValue(nil, 'SeShutdownPrivilege', tkPriv.Privileges[0].Luid);
  tkPriv.PrivilegeCount := 1;
  tkPriv.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
  AdjustTokenPrivileges(hToken, False, tkPriv, SizeOf(TTokenPrivileges), nil, Zero);
  case rdgExitWin.ItemIndex of
    0: ExitWindowsEx(EWX_LOGOFF, 0);
    1: ExitWindowsEx(EWX_REBOOT, 0);
    2: ExitWindowsEx(EWX_SHUTDOWN, 0);
  end;
end;

procedure TFrmSysCtrl.btnCloseClick(Sender: TObject);
begin
  Close;
end;


end.