add front demo in this project

LFtid1056/cloudfront/code/rocketmq/CErrorMessage.h

@@ -0,0 +1,32 @@
+/*
+ * 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.
+ */
+
+#ifndef __CERROR_MESSAGE_H__
+#define __CERROR_MESSAGE_H__
+
+#include "CCommon.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ROCKETMQCLIENT_API const char* GetLatestErrorMessage();  // Return the last error message
+
+#ifdef __cplusplus
+}
+#endif
+#endif  //__CERROR_MESSAGE_H__