+#if (NTDDI_VERSION >= NTDDI_WS03SP1)
+typedef struct _ACTIVATION_CONTEXT_STACK
+{
+ struct _RTL_ACTIVATION_CONTEXT_STACK_FRAME *ActiveFrame;
+ LIST_ENTRY FrameListCache;
+ ULONG Flags;
+ ULONG NextCookieSequenceNumber;
+ ULONG StackId;
+} ACTIVATION_CONTEXT_STACK, *PACTIVATION_CONTEXT_STACK;
+#else
+typedef struct _ACTIVATION_CONTEXT_STACK
+{
+ ULONG Flags;
+ ULONG NextCookieSequenceNumber;
+ struct _RTL_ACTIVATION_CONTEXT_STACK_FRAME *ActiveFrame;
+ LIST_ENTRY FrameListCache;
+} ACTIVATION_CONTEXT_STACK, *PACTIVATION_CONTEXT_STACK;
+#endif
+