windows 3.4.5 support use IChannel instead of IRtcEngine

Author: xianing

windows/APIExample/APIExample/Advanced/MultiChannel/CAgoraMultiChannelDlg.cpp

@@ -101,9 +101,6 @@ bool CAgoraMultiChannelDlg::InitAgora()
 void CAgoraMultiChannelDlg::UnInitAgora()
 {
 	if (m_rtcEngine) {
-		if (m_joinChannel)
-			//leave channel
-			m_joinChannel = !m_rtcEngine->leaveChannel();
 		for (auto &info : m_channels)
 		{
 			info.channel->release();
@@ -216,53 +213,40 @@ void CAgoraMultiChannelDlg::OnBnClickedButtonJoinchannel()
 		return;
 	}
 	std::string szChannelId = cs2utf8(strChannelName);
-	if (!m_joinChannel) {
-		//join main channel in the engine.
-		if (0 == m_rtcEngine->joinChannel(APP_TOKEN, szChannelId.c_str(), "", 0)) {
-			m_strMainChannel = strChannelName;
-			m_cmbChannelList.InsertString(m_cmbChannelList.GetCount(), strChannelName);
-			m_cmbChannelList.SetCurSel(0);
-			m_btnJoinChannel.EnableWindow(FALSE);
-			strInfo.Format(_T("join channel:%s ...."), strChannelName);
-			m_lstInfo.InsertString(m_lstInfo.GetCount(), strInfo);
-		}
-	}
-	else {
-		CString strTmp;
-		for (int nIndex = 0; nIndex < m_cmbChannelList.GetCount(); nIndex++)
-		{
-			m_cmbChannelList.GetLBText(nIndex, strTmp);
-			if (strTmp.Trim() == strChannelName)
-			{
-				AfxMessageBox(_T("you joined this channel!"));
-				return;
-			}
-		}
-		//create channel by channel id.
-		IChannel * pChannel = static_cast<IRtcEngine2 *>(m_rtcEngine)->createChannel(szChannelId.c_str());
-		//create channel event handler.
-		ChannelEventHandler* pEvt = new ChannelEventHandler;
-		//set message receiver window.
-		pEvt->setMsgHandler(GetSafeHwnd());
-		//add channels.
-		m_channels.emplace_back(szChannelId, pChannel, pEvt);
-		//set channel event handler.
-		pChannel->setChannelEventHandler(pEvt);
-		ChannelMediaOptions options;
-		options.autoSubscribeAudio = true;
-		options.autoSubscribeVideo = true;
-		options.publishLocalAudio = m_chkPublishAudio.GetCheck();
-		options.publishLocalVideo = m_chkPublishVideo.GetCheck();
-		pChannel->setClientRole(CLIENT_ROLE_BROADCASTER);
-		//join channel
-		if (0 == pChannel->joinChannel(APP_TOKEN, "", 0, options))
+	CString strTmp;
+	for (int nIndex = 0; nIndex < m_cmbChannelList.GetCount(); nIndex++)
+	{
+		m_cmbChannelList.GetLBText(nIndex, strTmp);
+		if (strTmp.Trim() == strChannelName)
 		{
-			m_btnJoinChannel.EnableWindow(FALSE);
-			m_cmbChannelList.InsertString(m_cmbChannelList.GetCount(), strChannelName);
-			strInfo.Format(_T("join channel:%s ...."), strChannelName);
-			m_lstInfo.InsertString(m_lstInfo.GetCount(), strInfo);
+			AfxMessageBox(_T("you joined this channel!"));
+			return;
 		}
 	}
+	//create channel by channel id.
+	IChannel * pChannel = static_cast<IRtcEngine2 *>(m_rtcEngine)->createChannel(szChannelId.c_str());
+	//create channel event handler.
+	ChannelEventHandler* pEvt = new ChannelEventHandler;
+	//set message receiver window.
+	pEvt->setMsgHandler(GetSafeHwnd());
+	//add channels.
+	m_channels.emplace_back(szChannelId, pChannel, pEvt);
+	//set channel event handler.
+	pChannel->setChannelEventHandler(pEvt);
+	ChannelMediaOptions options;
+	options.autoSubscribeAudio = true;
+	options.autoSubscribeVideo = true;
+	options.publishLocalAudio = m_chkPublishAudio.GetCheck();
+	options.publishLocalVideo = m_chkPublishVideo.GetCheck();
+	pChannel->setClientRole(CLIENT_ROLE_BROADCASTER);
+	//join channel
+	if (0 == pChannel->joinChannel(APP_TOKEN, "", 0, options))
+	{
+		m_btnJoinChannel.EnableWindow(FALSE);
+		m_cmbChannelList.InsertString(m_cmbChannelList.GetCount(), strChannelName);
+		strInfo.Format(_T("join channel:%s ...."), strChannelName);
+		m_lstInfo.InsertString(m_lstInfo.GetCount(), strInfo);
+	}
 }