XP系统中关机、注销、重启功能

void CRestartAndShutdown::OnRestartcom()
{
 CSystemCom systemcom;
 if(systemcom.DoModal() == IDOK){
  HANDLE hToken;
  TOKEN_PRIVILEGES tkp;
  DWORD dwVersion;
  dwVersion=GetVersion();  //取得当前操作系统的版本信息
  
  if(dwVersion<0x80000000){ //当系统版本高于98时执行以下代码
   OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,&hToken);
   LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
   tkp.PrivilegeCount = 1;
   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
   AdjustTokenPrivileges(hToken,FALSE,&tkp,0,(PTOKEN_PRIVILEGES)NULL,0);
   ExitWindowsEx(EWX_REBOOT|EWX_FORCE,0);
  }
  else
   ExitWindowsEx(EWX_REBOOT|EWX_FORCE,0);
 }
}

void CRestartAndShutdown::OnShutdowncom()
{
 CSystemCom systemcom;
 if(systemcom.DoModal() == IDOK){
  HANDLE hToken;
  TOKEN_PRIVILEGES tkp;
  DWORD dwVersion;
  dwVersion=GetVersion();  //取得当前操作系统的版本信息
  
  if(dwVersion<0x80000000){ //当系统版本高于98时执行以下代码
   OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,&hToken);
   LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
   tkp.PrivilegeCount = 1;
   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
   AdjustTokenPrivileges(hToken,FALSE,&tkp,0,(PTOKEN_PRIVILEGES)NULL,0);
   ExitWindowsEx(EWX_SHUTDOWN|EWX_FORCE,0);
  }
  else
   ExitWindowsEx(EWX_SHUTDOWN|EWX_FORCE,0);
 }
}

void CRestartAndShutdown::OnLogoffCom()
{
// SendMessage(WM_CLOSE,0,0);    //关闭登录窗口
/* CSystemCom systemcom;
 if(systemcom.DoModal() == IDOK+1){
  CDialog::OnOK();
  AfxGetMainWnd()->PostMessage(WM_CLOSE,0,0); //关闭主界面
  CLoginSystem login;
  login.DoModal();
 }*/
 CSystemCom systemcom;
 if(systemcom.DoModal() == IDOK){
  
  HANDLE hToken;
  TOKEN_PRIVILEGES tkp;
  DWORD dwVersion;
  dwVersion=GetVersion();  //取得当前操作系统的版本信息
  
  if(dwVersion<0x80000000){ //当系统版本高于98时执行以下代码
   OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY,&hToken);
   LookupPrivilegeValue(NULL,SE_SHUTDOWN_NAME,&tkp.Privileges[0].Luid);
   tkp.PrivilegeCount = 1;
   tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
   AdjustTokenPrivileges(hToken,FALSE,&tkp,0,(PTOKEN_PRIVILEGES)NULL,0);
   ExitWindowsEx(EWX_LOGOFF|EWX_FORCE,0);
  }
  else
   ExitWindowsEx(EWX_LOGOFF|EWX_FORCE,0);
 }

}