Please help with assembling parameters for SetFilePointer

Hi all,

I'm trying to write my own function setFilePtr():

Code:

---

__int64 setFilePtr(HANDLE hFile, __int64 lDistanceToMove, DWORD dwMoveMethod)
{
        LONG highOrder = ...
        LONG lowOrder = ...
        lowOrder = SetFilePointer (hFile, lowOrder, &highOrder, dwMoveMethod);
        if (lowOrder == 0xFFFFFFFF && GetLastError() != NO_ERROR)
        {
                highOrder = -1;
        }
        return highOrder;
}

---

As you may have guessed, it's just wrapper for SetFilePointer() made in order to be able to simply pass 64bit offset to it. But I don't know how to make low-order and high-order values from the given 64bit integer. I tried some byte shifting, but it didn't seem to work...

Thank you

I'd assume you could just adapt the LOWORD and HIWORD macros

#define LOWORD(l) ((WORD)(l))
#define HIWORD(l) ((WORD)(((DWORD)(l) >> 16) & 0xFFFF))