Thread: ofstream << LPCTSTR

  1. #1
    Registered User
    Join Date
    Aug 2006

    ofstream << LPCTSTR

    I'm writing a hooking program through Microsoft's Detours. I've hooked the WINAPI call CreateFile and am calling my own function before redirecting the information to kernel32.CreateFile. Here's what mine looks like:

    __declspec(dllexport) HANDLE WINAPI MyCreateFile(
    LPCTSTR lpFileName,
    DWORD dwDesiredAccess,
    DWORD dwShareMode,
    LPSECURITY_ATTRIBUTES lpSecurityAttributes,
    DWORD dwCreationDisposition,
    DWORD dwFlagsAndAttributes,
    HANDLE hTemplateFile)
    myfile << lpFileName;
    return CreateFile(lpFileName,dwDesiredAccess,dwShareMode, lpSecurityAttributes,dwCreationDisposition,dwFlags AndAttributes,hTemplateFile);

    it works, but the problem is that myfile (a pre-opened .txt) is filled with hex gibberish, like:


    I'm assuming it's actually printing the address pointed to by lpFileName. I've tried dereferencing like so:

    myfile << *lpFileName;

    and the new output is numerical gibberish:


    any ideas?

  2. #2
    carry on JaWiB's Avatar
    Join Date
    Feb 2003
    Seattle, WA
    I would guess you're compiling with UNICODE defined (which isn't a bad thing)

    In that case, you should use std::wofstream, or alternatively convert the wide string to multibyte (look at the wcstombs function)
    "Think not but that I know these things; or think
    I know them not: not therefore am I short
    Of knowing what I ought."
    -John Milton, Paradise Regained (1671)

    "Work hard and it might happen."

  3. #3
    Cat without Hat CornedBee's Avatar
    Join Date
    Apr 2003
    You should in fact use basic_ofstream<TCHAR>, so that it always matches the strings you use in the API.
    All the buzzt!

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
    - Flon's Law

  4. #4
    Registered User
    Join Date
    Aug 2006
    perfect, thanks!

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