关机 、待机和休眠编程

CString CPage1::ShowError()
{
 LPVOID lpMsgBuf;
 ::FormatMessage(
   FORMAT_MESSAGE_ALLOCATE_BUFFER |
   FORMAT_MESSAGE_FROM_SYSTEM |
   FORMAT_MESSAGE_IGNORE_INSERTS,
   NULL,
   ::GetLastError(),
   MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
   (LPTSTR) &lpMsgBuf,
   0,
   NULL
   );

 CString strMsg((LPCTSTR)lpMsgBuf);
 ::LocalFree( lpMsgBuf ); 
 
 return strMsg;
}

void CPage1::OnShutdown()
{

 GetDlgItem(IDC_STATE)->SetWindowText("正在试图关闭计算机，请稍候...");

 static HANDLE hToken;
 static TOKEN_PRIVILEGES tp;
 static LUID luid;
 if(::OpenProcessToken(GetCurrentProcess(),
                    TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,
        &hToken))
 {
  ::LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&luid);
  tp.PrivilegeCount=1;
  tp.Privileges[0].Luid =luid;
  tp.Privileges[0].Attributes =SE_PRIVILEGE_ENABLED;
  ::AdjustTokenPrivileges(hToken,false,&tp,sizeof(TOKEN_PRIVILEGES),NULL,NULL);
 }

 
  UpdateData(true);
 CString str;
 str.Format(");
 
 if(!::InitiateSystemShutdown(
       (LPTSTR)(LPCTSTR)str,
       "\n不好意思，我要关机了!",
       m_nTime,
    m_bAlert==0?true:false,
    m_nType==0?false:true
    ))
 {
  GetDlgItem(IDC_STATE)->SetWindowText(this->ShowError());      
 }
 else
  GetDlgItem(IDC_STATE)->SetWindowText("关机成功");

}

void CPage1::OnAbort()
{

 
 GetDlgItem(IDC_STATE)->SetWindowText("正在试图取消关机操作，请稍候...");

 UpdateData(true);
 CString str;
 str.Format(");

 if(!::AbortSystemShutdown((LPTSTR)(LPCTSTR)str))
 {
  GetDlgItem(IDC_STATE)->SetWindowText(this->ShowError());      
 }
 else
  GetDlgItem(IDC_STATE)->SetWindowText("取消成功");
}