#ifndef _NTIOAPI_H
// Input structure for IOCTL_MOUNTMGR_CHANGE_NOTIFY.
// Output structure for IOCTL_MOUNTMGR_CHANGE_NOTIFY.
typedef struct _MOUNTMGR_CHANGE_NOTIFY_INFO
{
ULONG EpicNumber;
} MOUNTMGR_CHANGE_NOTIFY_INFO, *PMOUNTMGR_CHANGE_NOTIFY_INFO;
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This structure is documented in Windows Driver Kit.