RtlCopyBitMap - NtDoc

#ifndef _NTRTL_H
#if (PHNT_VERSION >= PHNT_WIN8)

NTSYSAPI
VOID
NTAPI
RtlCopyBitMap(
    _In_ PRTL_BITMAP Source,
    _In_ PRTL_BITMAP Destination,
    _In_range_(0, Destination->SizeOfBitMap - 1) ULONG TargetBit
    );

#endif
#endif
View code on GitHub