#ifndef _NTMMAPI_H
//
// Virtual memory
//
#if (PHNT_MODE != PHNT_MODE_KERNEL)

 /**
 * The NtReadVirtualMemory routine reads virtual memory from a process.
 *
 * \param ProcessHandle A handle to the process whose memory is to be read.
 * \param BaseAddress A pointer to the base address in the specified process from which to read.
 * \param Buffer A pointer to a buffer that receives the contents from the address space of the specified process.
 * \param NumberOfBytesToRead The number of bytes to be read from the specified process.
 * \param NumberOfBytesRead A pointer to a variable that receives the number of bytes transferred into the specified buffer.
 * \return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtReadVirtualMemory(
    _In_ HANDLE ProcessHandle,
    _In_opt_ PVOID BaseAddress,
    _Out_writes_bytes_to_(NumberOfBytesToRead, *NumberOfBytesRead) PVOID Buffer,
    _In_ SIZE_T NumberOfBytesToRead,
    _Out_opt_ PSIZE_T NumberOfBytesRead
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwReadVirtualMemory(
    _In_ HANDLE ProcessHandle,
    _In_opt_ PVOID BaseAddress,
    _Out_writes_bytes_to_(NumberOfBytesToRead, *NumberOfBytesRead) PVOID Buffer,
    _In_ SIZE_T NumberOfBytesToRead,
    _Out_opt_ PSIZE_T NumberOfBytesRead
    );

#endif
View code on GitHub