Code implementation walk through

I am a VB coder, and I taugh myself that...  I really have had very little exposure to VC++ or any C lang to be honest...  I am trying to implement the following code using the MSFT Visual C++ 2005 Express app that is avialable online and I just don't know enough about C to begin to understand how everything works, or how to actually utilize the code that is provided.  Any assistance would be greatly appreciated.  I have assigned 500 points however if someone is willing to walk me through the coding process (Since I am only using C this one time) I will create another points question for the individual that answers the question.  I just want this to be an EXE to be executed without any interface (If possible)...

Code I want to use...

Here is a slightly modified LOCKWS.CPP from the "Locking a window station" example which emulates C-A-D if you run LOCK.EXE:

// lockws.cpp

#define STRICT
#include <windows.h>
#include <fstream.h>

HINSTANCE   hDll;
CHAR        libName[MAX_PATH];
HDESK       hWinlogon;
HANDLE      hThread=0;
DWORD       dwThreadId;
HWND        hGeneric,hDialog;
PSECURITY_DESCRIPTOR psd;

// Log files
//ofstream o("C:\\out");
//ofstream o2("C:\\out2");

DWORD WINAPI threadProc(LPVOID);

//---------------------------------------------------------------------------
//
// Finds Winlogon generic control dialog
//
BOOL CALLBACK findGeneric(HWND hwnd,LPARAM)
{
   CHAR text[1024];
   GetWindowText(hwnd,text,sizeof(text));
   if(!strcmp(text,"Winlogon generic control dialog")) {
      hGeneric=hwnd;
      return FALSE;
   }
   return TRUE;
}
//---------------------------------------------------------------------------
//
// Finds Windows NT security dialog
//
BOOL CALLBACK findDialog(HWND hwnd,LPARAM)
{
   CHAR text[1024];
   GetWindowText(hwnd,text,sizeof(text));
   //o2<<text<<' '<<hwnd<<endl;
   if(!strcmp(text,"Windows NT Security")) {
      hDialog=hwnd;
      return FALSE;
   }
   return TRUE;
}
//---------------------------------------------------------------------------
BOOL WINAPI DllEntryPoint(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID)
{
   if(fdwReason==DLL_PROCESS_ATTACH) {
      //MessageBeep(-1);
      hDll=hinstDLL;
      GetModuleFileName(hDll,libName,sizeof(libName));

      hWinlogon=OpenDesktop("Winlogon",0,FALSE,
         //DESKTOP_CREATEMENU  |
         //DESKTOP_CREATEWINDOW |
         DESKTOP_ENUMERATE |
         //DESKTOP_HOOKCONTROL |
         //DESKTOP_JOURNALPLAYBACK |
         //DESKTOP_JOURNALRECORD |
         DESKTOP_READOBJECTS
         //DESKTOP_SWITCHDESKTOP |
         //DESKTOP_WRITEOBJECTS
      );
      //o<<"hWinlogon="<<hWinlogon<<endl;

      hThread=CreateThread(0,0,threadProc,0,0,&dwThreadId);
      //o<<"hThread="<<hThread<<endl;

      //if(hThread) {
         // Make sure we are remain after NINJLIB.EXE
         //LoadLibrary(libName);
      //}
   }
   else if(fdwReason==DLL_PROCESS_DETACH) {
      //MessageBeep(-1);
      if(hThread) {
         TerminateThread(hThread,0);
         CloseHandle(hThread);
      }
      CloseDesktop(hWinlogon);
   }

   return TRUE;
}
//---------------------------------------------------------------------------
DWORD WINAPI threadProc(LPVOID)
{
   psd=(PSECURITY_DESCRIPTOR) LocalAlloc(LPTR,
      SECURITY_DESCRIPTOR_MIN_LENGTH);
   InitializeSecurityDescriptor(psd,SECURITY_DESCRIPTOR_REVISION);
   SetSecurityDescriptorDacl(psd,TRUE,0,FALSE);
   SECURITY_ATTRIBUTES sa={
      sizeof(SECURITY_ATTRIBUTES),
      psd,
      FALSE
   };

   HANDLE hEvent=CreateEvent(&sa,FALSE,FALSE,"Nick Lock Station");
   //o2<<"hEvent="<<hEvent<<endl;
   if(hEvent) {
      while(1) {
         //MessageBeep(-1);
         DWORD r=WaitForSingleObject(hEvent,INFINITE);
         if(r==WAIT_OBJECT_0) {
            HWND w=FindWindow("SAS window class","SAS window");
            SendMessage(w,WM_HOTKEY,0,MAKELPARAM(MOD_ALT|MOD_CONTROL,VK_DELETE));
         }
      }
   }
   return 0;
}

-----------------BREAK-------------------

Links I have so far on the topic...

http://www.experts-exchange.com/Programming/Programming_Platforms/Win_Prog/Q_10942141.html
http://www.derkeiler.com/Newsgroups/microsoft.public.platformsdk.security/2004-02/0498.html
http://www.experts-exchange.com/Programming/Programming_Languages/Visual_Basic/Q_20903474.html?query=&clearTAFilter=true

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