NtQueryInformationProcess - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTPSAPI_H
// Processes
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtQueryInformationProcess(
    _In_ HANDLE ProcessHandle,
    _In_ PROCESSINFOCLASS ProcessInformationClass,
    _Out_writes_bytes_(ProcessInformationLength) PVOID ProcessInformation,
    _In_ ULONG ProcessInformationLength,
    _Out_opt_ PULONG ReturnLength
    );

#endif
#endif

View code on GitHub
#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwQueryInformationProcess(
    _In_ HANDLE ProcessHandle,
    _In_ PROCESSINFOCLASS ProcessInformationClass,
    _Out_writes_bytes_(ProcessInformationLength) PVOID ProcessInformation,
    _In_ ULONG ProcessInformationLength,
    _Out_opt_ PULONG ReturnLength
    );

#endif

View code on GitHub

This function is documented in Windows SDK.

ProcessHandle

Handle to process opened with PROCESS_QUERY_INFORMATION access.

ProcessInformationClass

See PROCESS_INFORMATION_CLASS.

ProcessInformation

Buffer for results.

ProcessInformationLength

Length of buffer. See PROCESS_INFORMATION_CLASS for additional information.

ReturnLength

Number of bytes needed, if ProcessInformationLength was too small.

Documented by

See also

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