[C] Add a section to an executable

[Nytro]

BOOL AddSection(char *szFileName,char *szSectionName,DWORD dwDesiredSectionSize){
   HANDLE hFile = CreateFile(szFileName,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
   if (hFile == INVALID_HANDLE_VALUE) return FALSE;
   DWORD dwFileSize = GetFileSize(hFile,NULL);
   BYTE *pByte = new BYTE[dwFileSize];
   DWORD dwUseLess;
   ReadFile(hFile,pByte,dwFileSize,&dwUseLess,NULL);
   IMAGE_DOS_HEADER *pDosHeader = (IMAGE_DOS_HEADER*)pByte;
   IMAGE_FILE_HEADER *pFileHeader = (IMAGE_FILE_HEADER*)(pByte + pDosHeader->e_lfanew + sizeof(DWORD));
   IMAGE_OPTIONAL_HEADER *pOptionalHeader = (IMAGE_OPTIONAL_HEADER*)(pByte + pDosHeader->e_lfanew + sizeof(DWORD) + sizeof(IMAGE_FILE_HEADER));
   IMAGE_SECTION_HEADER *pSectionHeader = (IMAGE_SECTION_HEADER*)(pByte + pDosHeader->e_lfanew + sizeof(IMAGE_NT_HEADERS));
   ZeroMemory(&pSectionHeader[pFileHeader->NumberOfSections],sizeof(IMAGE_SECTION_HEADER));
   CopyMemory(&pSectionHeader[pFileHeader->NumberOfSections].Name,szSectionName,8);
   pSectionHeader[pFileHeader->NumberOfSections].Misc.VirtualSize = round(dwDesiredSectionSize,pOptionalHeader->SectionAlignment,0);
   pSectionHeader[pFileHeader->NumberOfSections].VirtualAddress = round(pSectionHeader[pFileHeader->NumberOfSections-1].Misc.VirtualSize,pOptionalHeader->SectionAlignment,pSectionHeader[pFileHeader->NumberOfSections - 1].VirtualAddress);
   pSectionHeader[pFileHeader->NumberOfSections].SizeOfRawData = round(dwDesiredSectionSize,pOptionalHeader->FileAlignment,0);
   pSectionHeader[pFileHeader->NumberOfSections].PointerToRawData = round(pSectionHeader[pFileHeader->NumberOfSections - 1].SizeOfRawData,pOptionalHeader->FileAlignment,pSectionHeader[pFileHeader->NumberOfSections - 1].PointerToRawData);
   pSectionHeader[pFileHeader->NumberOfSections].Characteristics = 0xE00000E0;
   SetFilePointer(hFile,pSectionHeader[pFileHeader->NumberOfSections].PointerToRawData + pSectionHeader[pFileHeader->NumberOfSections].SizeOfRawData ,NULL,FILE_BEGIN);
   SetEndOfFile(hFile);
   pOptionalHeader->SizeOfImage = pSectionHeader[pFileHeader->NumberOfSections].VirtualAddress + pSectionHeader[pFileHeader->NumberOfSections].Misc.VirtualSize;
   pFileHeader->NumberOfSections = pFileHeader->NumberOfSections + 1;
   SetFilePointer(hFile,0,NULL,FILE_BEGIN);
   WriteFile(hFile,pByte,dwFileSize,&dwUseLess,NULL);
   CloseHandle(hFile);
   return TRUE;
}