Get file name without extension?

I'm new to C++ world, I stuck with a very trivial problem i.e. to get file name without extension.

I have TCHAR variable containing sample.txt, and need to extract only sample, I used PathFindFileName function it just return same value what I passed.

I tried googling for solution but still no luck?!

EDIT: I always get three letter file extension, I have added the following code, but at the end I get something like Montage (2)««þîþ how do I avoid junk chars at the end?

TCHAR* FileHandler::GetFileNameWithoutExtension(TCHAR* fileName)
{
    int fileLength = _tcslen(fileName) - 4;
    TCHAR* value1 = new TCHAR;
    _tcsncpy(value1, fileName, fileLength);
    return value1;
}

Here's how it's done.

#ifdef UNICODE //Test to see if we're using wchar_ts or not.
    typedef std::wstring StringType;
#else
    typedef std::string StringType;
#endif

StringType GetBaseFilename(const TCHAR *filename)
{
    StringType fName(filename);
    size_t pos = fName.rfind(T("."));
    if(pos == StringType::npos)  //No extension.
        return fName;

    if(pos == 0)    //. is at the front. Not an extension.
        return fName;

    return fName.substr(0, pos);
}

This returns a std::string or a std::wstring, as appropriate to the UNICODE setting. To get back to a TCHAR*, you need to use StringType::c_str(); This is a const pointer, so you can't modify it, and it is not valid after the string object that produced it is destroyed.