Can't get file time

Question

Hi,
I need to get the file times for a file existing in the same directory as the exe file itself. However, the getfiletime function I'm using returns 0, which means it doesn't work. The error code is 87,
ERROR_INVALID_PARAMETER. Could anyone see what could be wrong with the following? I work with C Winapi in Microsoft Visual C++ 2010 Express.
FILETIME ftCreate, ftAccess, ftWrite;
HANDLE hFile;
LPCWSTR fname = L"gnsh.dat";
BOOL WINAPI timeresult;
hFile = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
timeresult = GetFileTime(hFile, &ftCreate, &ftAccess, &ftWrite);
Thanks in advance.

Answer 1

I am confused -- you say that hFile is not INVALID_HANDLE_VALUE, but you say that hFile is 0xFFFFFFFF.  One of those statements must be false, since INVALID_HANDLE_VALUE == 0xFFFFFFFF.
Now since ftCreate is a FILETIME which is a structure, I don't know what you intend to determine by sending it to swprintf with the %d format flag. 
If you want to look at ftCreate as an integer, you could use something like
ULARGE_INTEGER li = { ftCreate.dwLowDateTime, ftCreate.dwHighDateTime };
swprintf(testtxt, 25, L"%I64d", li.QuadPart);
Now, this will still give you some sort of crazy number that is more or less meaningless to a human, but at least it is the correct crazy number.  (It is the number of 100 ns intervals since 1601 if you care).
If you want a human readable string there are a few approaches.  You could convert the file time to a
system time . You can then use printf yourself on the system time or
GetTimeFormatEx to get a string.  You could also convert the
FILETIME to a time_t and use strftime or similar functions to get a human readable string.