#ifndef _NTSXS_H
#include <pshpack4.h>

typedef struct _ACTIVATION_CONTEXT_DATA_TOC_HEADER
{
    ULONG HeaderSize;
    ULONG EntryCount;
    ULONG FirstEntryOffset; // to ACTIVATION_CONTEXT_DATA_TOC_ENTRY[], from ACTIVATION_CONTEXT_DATA base
    ULONG Flags; // ACTIVATION_CONTEXT_DATA_TOC_HEADER_*
} ACTIVATION_CONTEXT_DATA_TOC_HEADER, *PACTIVATION_CONTEXT_DATA_TOC_HEADER;

#include <poppack.h>
#endif
View code on GitHub