c ++ CreateFile cause of memory can not be written error

SzFileName LPCWSTR;
szFileName = argv [2];
// LPCWSTR szFileName = L "test.txt"; // file name can be modified according to their needs, or with variable input
HANDLE hFile = CreateFile (szFileName, GENERIC_READ , FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
// open sharing, to avoid the need to read the rest of this file
IF (INVALID_HANDLE_VALUE = hFile)!
{
DWORD dwFileSize = GetFileSize (hFile, NULL);
PBYTE pBuffer = (PBYTE) malloc (dwFileSize + 2);
int iLen = 0;
IF (the ReadFile (hFile, pBuffer, dwFileSize, & dwFileSize, NULL)!)
{
Free (pBuffer);
return FALSE;
}
// the CloseHandle (hFile);
pBuffer [dwFileSize] = ' \ 0 ';
pBuffer [dwFileSize +. 1] =' \ 0 ';
//std::wstring srcEncode;
srcEncode = DetectEncode(pBuffer, dwFileSize);
CloseHandle(hFile);
free(pBuffer);

 

HANDLE hFile = CreateFile(szFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

This sentence, reading and writing files to choose FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE mode, otherwise it may lead to repeated opening and closing memory can not be written error that is run through when the exe program, call the debug command finds.