#ifndef _NTRTL_H

/**
 * Gets a value indicating whether the process is currently in the shutdown phase.
 *
 * \return TRUE if a shutdown of the current dll process is in progress; otherwise, FALSE.
 */
NTSYSAPI
BOOLEAN
NTAPI
RtlDllShutdownInProgress(
    VOID
    );

#endif
View code on GitHub

BOOLEAN
RtlDllShutdownInProgress (
    VOID
);
View the official Win32 development documentation

NtDoc

This function is documented in Windows SDK.

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Win32 development documentation (rtldllshutdowninprogress)

RtlDllShutdownInProgress function

Gets a value indicating whether a shutdown of the current dll process is in progress.

Parameters

None.

Return value

TRUE if a shutdown of the current dll process is in progress; otherwise, FALSE.

Remarks

This function is not defined in an SDK header and must be declared by the caller. This function is exported from ntdll.dll.

Requirements

Requirement	Value
Minimum supported client	Windows 10
Minimum supported server	Windows 10
DLL	Ntdll.dll

RtlDllShutdownInProgress - NtDoc