include: Add EventRegistrationToken struct in eventtoken.idl.

include/Makefile.in

@@ -283,6 +283,7 @@ SOURCES = \
 	errors.h \
 	errrec.idl \
 	evcode.h \
+	eventtoken.idl \
 	evntprov.h \
 	evntrace.h \
 	evr.idl \

include/eventtoken.idl

+/*
+ * Copyright 2021 Rémi Bernon for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+struct EventRegistrationToken
+{
+    __int64 value;
+};
+typedef struct EventRegistrationToken EventRegistrationToken;