The ACL_SIZE_INFORMATION structure contains information about the size of an ACL structure.
typedef struct _ACL_SIZE_INFORMATION {
DWORD AceCount;
DWORD AclBytesInUse;
DWORD AclBytesFree;
} ACL_SIZE_INFORMATION;
Windows NT: Requires version 3.1 or later.
Windows: Unsupported.
Windows CE: Unsupported.
Header: Declared in winnt.h.
Low-Level Access-Control Overview, Low-Level Access Control Structures, GetAclInformation, SetAclInformation, ACL, ACL_INFORMATION_CLASS, ACL_REVISION_INFORMATION