How can i get the file ACCESS MODE in my filter?

NTFSD
1

such as dwShareMode in CreateFile Function.
HANDLE CreateFile(
LPCTSTR lpFileName,
DWORD dwDesiredAccess,
DWORD dwShareMode,
LPSECURITY_ATTRIBUTES lpSecurityAttributes,
DWORD dwCreationDisposition,
DWORD dwFlagsAndAttributes,
HANDLE hTemplateFile
);
at the time a application attemps to write or read on disk,i want to get the dwShareMode(ACESS MODE).can some tell me?
thanks~