Adjust the Windows NT privileges to reboot

Windows with Delphi
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Adjust the Windows NT privileges to reboot

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If you need to reboot the PC in Delphi 3 on a Windows NT machine, you need to get the right privileges for this.
The following code provides a procedure to adjust the privileges and then boots the PC.

Unit BootNT;

// uses ....

Interface

Function AdjustTokenPrivileges (TokenHandle: THandle;
  DisableAllPrivileges: BOOL; Const NewState: TTokenPrivileges;
  BufferLength: DWORD; PreviousState: PTokenPrivileges;
  ReturnLength: PWORD) : BOOL;
  Stdcall;
Implementation
Function AdjustTokenPrivileges;
  External 'advapi32.dll' Name 'AdjustTokenPrivileges';
{$R *.DFM}
Procedure RebootWindowsNT;
Const
  AdjustMsg = 'Could not adjust the Privilege.' + #13#10;
  TokenMsg = 'Could not open the Token.' + #13#10;
  FailMsg = 'Rebooting Windows is failed';
Var
  Success : Boolean;
  TokenPriv : TTokenPrivileges;
  TokenHandle : THandle;
  CurrentProc : THandle;
Begin
  Success := False;
  CurrentProc := GetCurrentProcess;
  If OpenProcessToken (CurrentProc,
                       TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY,
                       TokenHandle) Then
  Begin
    // get privilege
    If LookupPrivilegeValue (Nil, 'SeShutdownPrivilege',
	     TokenPriv.Privileges[0].LUID) Then
    Begin
      TokenPriv.PrivilegeCount := 1;
      TokenPriv.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
      // Reboot system
      If AdjustTokenPrivileges (TokenHandle, False, TokenPriv,
	                            0, Nil, Nil) Then
        Success := ExitWindowsEx (EWX_REBOOT, 0);
      If not Success Then
        ShowMessage (AdjustMsg + FailMsg)
    End
  End
  Else
    ShowMessage (TokenMsg + FailMsg);
End;

Procedure TForm1.Button1Click (Sender: TObject);
Begin
  RebootWindowsNT;
End;
End.

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