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diff --git a/qpid/cpp/src/qpid/store/ms-sql/State.h b/qpid/cpp/src/qpid/store/ms-sql/State.h
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+++ b/qpid/cpp/src/qpid/store/ms-sql/State.h
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+#ifndef QPID_STORE_MSSQL_STATE_H
+#define QPID_STORE_MSSQL_STATE_H
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+namespace qpid {
+namespace store {
+namespace ms_sql {
+
+class DatabaseConnection;
+
+/**
+ * @struct State
+ *
+ * Represents a thread's state for accessing ADO and the database.
+ * Creating an instance of State initializes COM for this thread, and
+ * destroying it uninitializes COM. There's also a DatabaseConnection
+ * for this thread's default access to the database. More DatabaseConnections
+ * can always be created, but State has one that can always be used by
+ * the thread whose state is represented.
+ *
+ * This class is intended to be one-per-thread, so it should be accessed
+ * via thread-specific storage.
+ */
+struct State {
+    State();
+    ~State();
+    DatabaseConnection *dbConn;
+};
+
+}}}  // namespace qpid::store::ms_sql
+
+#endif /* QPID_STORE_MSSQL_STATE_H */