2OOO, 27 December
typedef struct _PEB_LDR_DATA {
  ULONG                   Length;
  BOOLEAN                 Initialized;
  PVOID                   SsHandle;
  LIST_ENTRY              InLoadOrderModuleList;
  LIST_ENTRY              InMemoryOrderModuleList;
  LIST_ENTRY              InInitializationOrderModuleList;
} PEB_LDR_DATA, *PPEB_LDR_DATA;
Size of structure, used by ntdll.dll as structure version ID.
If set, loader data section for current process is initialized.
- ???
Doubly linked list containing pointers to LDR_MODULE structure for previous and next module in load order.
As above, but in memory placement order.
As InLoadOrderModuleList, but in initialization order.