#ifndef _NTMMAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * The NtExtendSection routine extends the size of an existing section object.
 *
 * \param SectionHandle A handle to the section object to extend.
 * \param NewSectionSize A pointer to a LARGE_INTEGER that specifies the new section size, in bytes.
 * \return NTSTATUS Successful or errant status.
 */
_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
NtExtendSection(
    _In_ HANDLE SectionHandle,
    _Inout_ PLARGE_INTEGER NewSectionSize
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
ZwExtendSection(
    _In_ HANDLE SectionHandle,
    _Inout_ PLARGE_INTEGER NewSectionSize
    );

#endif
View code on GitHub