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Peter Müller

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C++ :Change value from DisableCMD registry

Hey i have big problem i rly dunno how to do it i found  100 kinds of ways to do this but its not working:
i would like to change the value from the from (HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\DisableCMD "Start (REG_DWORD)") data to 0. I know i need admin rights to do this so i already have a code for this (scroll down) can someone give me an example how to do this?

p.s i would like to run this programm on a different pc so dont tell me could just change the (Standard) value,
 thanks for helping ;)







//Elevation.cpp
#include <Windows.h>
#include <iostream>

BOOL IsRunAsAdministrator();
void ElevateNow()
{
Reask:
      BOOL bAlreadyRunningAsAdministrator = FALSE;
      try
      {
            bAlreadyRunningAsAdministrator = IsRunAsAdministrator();
      }
      catch (...)
      {
            _asm nop
      }
      if (!bAlreadyRunningAsAdministrator)
      {
            char szPath[MAX_PATH];
            if (GetModuleFileName(NULL, szPath, ARRAYSIZE(szPath)))
            {


                  SHELLEXECUTEINFO sei = { sizeof(sei) };

                  sei.lpVerb = "runas";
                  sei.lpFile = szPath;
                  sei.hwnd = NULL;
                  sei.nShow = SW_NORMAL;

                  if (!ShellExecuteEx(&sei))
                  {
                        DWORD dwError = GetLastError();
                        if (dwError == ERROR_CANCELLED)
                              //Annoys you to Elevate it LOL
                              CreateThread(0, 0, (LPTHREAD_START_ROUTINE)ElevateNow, 0, 0, 0);
                  }
            }

      }
      else
      {
            goto Reask;
      }
}

 


//Determination.cpp
#include <Windows.h>
#include <iostream>

BOOL IsRunAsAdministrator()
{
      BOOL fIsRunAsAdmin = FALSE;
      DWORD dwError = ERROR_SUCCESS;
      PSID pAdministratorsGroup = NULL;

      SID_IDENTIFIER_AUTHORITY NtAuthority = SECURITY_NT_AUTHORITY;
      if (!AllocateAndInitializeSid(
            &NtAuthority,
            2,
            SECURITY_BUILTIN_DOMAIN_RID,
            DOMAIN_ALIAS_RID_ADMINS,
            0, 0, 0, 0, 0, 0,
            &pAdministratorsGroup))
      {
            dwError = GetLastError();
            goto Cleanup;
      }

      if (!CheckTokenMembership(NULL, pAdministratorsGroup, &fIsRunAsAdmin))
      {
            dwError = GetLastError();
            goto Cleanup;
      }

Cleanup:

      if (pAdministratorsGroup)
      {
            std::cout << "Mal sehnen ob das geht ;)";
            FreeSid(pAdministratorsGroup);
            pAdministratorsGroup = NULL;
      }

      if (ERROR_SUCCESS != dwError)
      {
            throw dwError;
      }

      return fIsRunAsAdmin;
}

//main.cpp
int main()
{
      {
            if (IsRunAsAdministrator())
            {
            }
            else
            {
                  if (MessageBox(0, "Need To Elevate", "Critical Disk Error", MB_SYSTEMMODAL | MB_ICONERROR | MB_YESNO) == IDYES) //Adminrechte bekommen
                  {
                        ElevateNow();
                        std::cout << "Tst";
                  }
                  else
                  {
                        std::cout << "Tst";
                        MessageBox(0, "You Better give me Elevation or I will attack u", "System Critical Error", MB_SYSTEMMODAL | MB_OK | MB_ICONERROR);
                        ElevateNow();
                  }
            }

      }
  }
  return 0;
}
Avatar of Zoppo
Zoppo
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Hi Peter Müller,

which Visual Studio version do you use? And in what Windows versions should this run at minimum?

I ask because at least since VS 2010 (I had no older version to check) there's a really simple way to ensure an application can only be started as administator via a linker option, but this won't work on Windows versions before Windows Vista because it's using UAC via a manifest:User generated imageHope that helps,

ZOPPO
Avatar of Peter Müller
Peter Müller

ASKER

Thanks for your anwser Zoppo!

Im using Visual Studio 2013 and min windows 7,
but that is not my problem i can easyly run my programm as admin with my code!  I want to know how change the value from this HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\System\DisableCMD "Start (REG_DWORD) data thats my real question
ASKER CERTIFIED SOLUTION
Avatar of Zoppo
Zoppo
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Thanks that worked for me i ll play i little bit with the commands and try to figure out how u did it thanks <3