Index: dll/win32/advapi32/advapi32.spec
===================================================================
--- dll/win32/advapi32/advapi32.spec	(revision 63592)
+++ dll/win32/advapi32/advapi32.spec	(working copy)
@@ -432,8 +432,8 @@
 @ stdcall OpenServiceA(long str long)
 @ stdcall OpenServiceW(long wstr long)
 @ stdcall OpenThreadToken(long long long ptr)
-@ stub OpenTraceA
-@ stub OpenTraceW
+@ stdcall OpenTraceA(ptr)
+@ stdcall OpenTraceW(ptr)
 @ stdcall PrivilegeCheck(ptr ptr ptr)
 @ stdcall PrivilegedServiceAuditAlarmA(str str long ptr long)
 @ stdcall PrivilegedServiceAuditAlarmW(wstr wstr long ptr long)
Index: dll/win32/advapi32/misc/trace.c
===================================================================
--- dll/win32/advapi32/misc/trace.c	(revision 63592)
+++ dll/win32/advapi32/misc/trace.c	(working copy)
@@ -172,6 +172,26 @@
 }
 
 /******************************************************************************
+ * OpenTraceW [ADVAPI32.@]
+ */
+TRACEHANDLE WINAPI OpenTraceW( PEVENT_TRACE_LOGFILEW logfile )
+{
+    FIXME("%p: stub\n", logfile);
+    SetLastError(ERROR_ACCESS_DENIED);
+    return INVALID_PROCESSTRACE_HANDLE;
+}
+
+/******************************************************************************
+ * OpenTraceA [ADVAPI32.@]
+ */
+TRACEHANDLE WINAPI OpenTraceA( PEVENT_TRACE_LOGFILEA logfile )
+{
+    FIXME("%p: stub\n", logfile);
+    SetLastError(ERROR_ACCESS_DENIED);
+    return INVALID_PROCESSTRACE_HANDLE;
+}
+
+/******************************************************************************
  * QueryAllTracesW [ADVAPI32.@]
  *
  * Query information for started event trace sessions
Index: include/psdk/evntrace.h
===================================================================
--- include/psdk/evntrace.h	(revision 63592)
+++ include/psdk/evntrace.h	(working copy)
@@ -711,7 +711,7 @@
   PEVENT_FILTER_DESCRIPTOR EnableFilterDesc;
 } ENABLE_TRACE_PARAMETERS, *PENABLE_TRACE_PARAMETERS;
 
-#define INVALID_PROCESSTRACE_HANDLE ((TRACEHANDLE)INVALID_HANDLE_VALUE)
+#define INVALID_PROCESSTRACE_HANDLE ((TRACEHANDLE)~(ULONG_PTR)0)
 
 #if defined(UNICODE) || defined(_UNICODE)