Different fileno() return value reported for standard streams in non-console Windows application (i.e. MFC GUI application)

msvc_fileno_std_streams_test.c

BOOL MyOnInitDialog()
{
    int fdi, fdo, fde;
    fdi = fileno(stdin);
    fdo = fileno(stdout);
    fde = fileno(stderr);
#if _MSC_VER < 1700
    assert(fdi == -2);
    assert(fdo == -2);
    assert(fde == -2);
#else
    assert(fdi == 0);
    assert(fdo == 1);
    assert(fde == 2);
#endif
}