C / C++ / MFC

#include"windows.h"
#include"conio.h"
#include"stdio.h"
int main()
{
HANDLE hFile;
HANDLE hResource;
DWORD dwFileSize,      
      dwBytesRead;
LPBYTE lpBuffer;

hFile = CreateFile("calc.exe", GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

if(hFile == NULL )
{
    printf("%s","file not opened" );
}
else
{
    printf( "%s","file opened" );
}

if (INVALID_HANDLE_VALUE != hFile)
{
    dwFileSize = GetFileSize(hFile, NULL);
    lpBuffer = new BYTE[dwFileSize];
    if (ReadFile(hFile, lpBuffer, dwFileSize, &dwBytesRead, NULL) != FALSE)
    {
        hResource = BeginUpdateResource("extractor.exe", FALSE);
        if (NULL != hResource)
        {
            if (UpdateResource(hResource, 
                    RT_RCDATA, 
                    MAKEINTRESOURCE(104), 
                    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), 
                    (LPVOID) lpBuffer, 
                    dwFileSize) != FALSE)
    	   {
                EndUpdateResource(hResource, FALSE);
                printf("%s","\nresource updated" );
            }
        }
    }
    delete [] lpBuffer;
    CloseHandle(hFile);
    }
    getch();
    return 0;
}

#include"windows.h"




int main()
{
    HMODULE hLibrary;
    HRSRC hResource;
    HGLOBAL hResourceLoaded;
    LPBYTE lpBuffer;

    hLibrary = LoadLibrary("extractor.exe");
    if (NULL != hLibrary)
    {
        hResource = FindResource(hLibrary, MAKEINTRESOURCE(104), RT_RCDATA);
        if (NULL != hResource)
        {
            hResourceLoaded = LoadResource(hLibrary, hResource);
            if (NULL != hResourceLoaded)
            {
                lpBuffer = (LPBYTE) LockResource(hResourceLoaded);           
                if (NULL != lpBuffer)
                {
                    DWORD dwFileSize,dwBytesWritten;
                    HANDLE hFile;
                    dwFileSize = SizeofResource(hLibrary, hResource);
                    hFile = CreateFile("newcreation.exe", GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
                    if (INVALID_HANDLE_VALUE != hFile)
                    {
                        WriteFile(hFile, lpBuffer, dwFileSize, &dwBytesWritten, NULL);
                        CloseHandle(hFile);
                    }
                }
            }
        }
        FreeLibrary(hLibrary);
    }
    return 0;
}