diff --git a/src/chatdialog.cpp b/src/chatdialog.cpp
new file mode 100644
index 0000000..1c3e37e
--- /dev/null
+++ b/src/chatdialog.cpp
@@ -0,0 +1,42 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#include "chatdialog.h"
+#include "ui_chatdialog.h"
+
+using namespace std;
+using namespace ndn;
+
+ChatDialog::ChatDialog(const Name& chatroomPrefix,
+		       const Name& localPrefix,
+		       QWidget *parent) 
+    : QDialog(parent)
+    , m_chatroomPrefix(chatroomPrefix)
+    , m_localPrefix(localPrefix)
+    , ui(new Ui::ChatDialog)
+{
+    ui->setupUi(this);
+}
+
+ChatDialog::~ChatDialog()
+{
+    delete ui;
+}
+
+void
+ChatDialog::sendInvitation()
+{
+  
+}
+
+#if WAF
+#include "chatdialog.moc"
+#include "chatdialog.cpp.moc"
+#endif