Net 3.5框架下运用。
RDPSession 可以用于无人为输入用户名和密码进行远程桌面的连接和共享。
原来在Win10下用visual studio 2019下进行3.5框架运用，但是调用3.5框架下的axRDPViewer会出错，因此改用windows7下的visual studio 2010进行（主要是考虑远古win系统应用）。
（以下代码参考了csdn和StackOverflow下的N多例子，再次感谢）

Server端：
添加引用：interop.RDPCAMPILib.dll

 #regionprivate static RDPCOMAPILib.RDPSession rdp = new RDPCOMAPILib.RDPSession();private static RDPCOMAPILib.RDPSRAPIInvitation invitation=null;private static RDPCOMAPILib.IRDPSRAPIVirtualChannel virtualChannel;private static string localIP;private static string rdpConnectStr;#endregion//rdp 连接以后事件
rdp.OnAttendeeConnected+=new RDPCOMAPILib._IRDPSessionEvents_OnAttendeeConnectedEventHandler(rdp_OnAttendeeConnected);
//rdp失去连接以后事件
rdp.OnAttendeeDisconnected += new RDPCOMAPILib._IRDPSessionEvents_OnAttendeeDisconnectedEventHandler(rdp_OnAttendeeDisconnected);
//rdp设置能看的区域
rdp.SetDesktopSharedRect(0, 0, System.Windows.Forms.Screen.PrimaryScreen.Bounds.Width, System.Windows.Forms.Screen.PrimaryScreen.Bounds.Height);
//rdp创建一个发送message的，名称为111的虚拟通道，这个名称要和浏览端创建的虚拟通道名称一致
virtualChannel = rdp.VirtualChannelManager.CreateVirtualChannel("111",RDPCOMAPILib.CHANNEL_PRIORITY.CHANNEL_PRIORITY_HI,(uint)RDPCOMAPILib.CHANNEL_FLAGS.CHANNEL_FLAGS_LEGACY);
//rdp虚拟通道接收到信息事件
rdp.OnChannelDataReceived += new RDPCOMAPILib._IRDPSessionEvents_OnChannelDataReceivedEventHandler(rdp_OnChannelDataReceived);
//创建一个邀请string，null 和Guid参数为文档要求Unique,连接数为1，连接密码空
invitation = rdp.Invitations.CreateInvitation(null, System.Guid.NewGuid().ToString(), "", 1);
//这个string要发给浏览端
rdpConnectStr = invitation.ConnectionString;rdp.Open();
Console.WriteLine("{0}:RDPSession is open.......",DateTime.Now.ToLongTimeString());

各种事件

//这个事件用来接收利用rdp虚拟通道发来的信息
static void rdp_OnChannelDataReceived(object pChannel, int lAttendeeId, string bstrData){Console.WriteLine("{0}:From RdpViewr Message:{1}",DateTime.Now.ToLongTimeString(),bstrData.Trim());//throw new NotImplementedException();}
//这个用来处理viewer端失去连接后的事件
static void rdp_OnAttendeeDisconnected(object pDisconnectInfo){Console.WriteLine("{0}:Remote RdpViewer Closed........",DateTime.Now.ToLongTimeString());            //throw new NotImplementedException();}
//此事件为必须，否则无法共享桌面
static void rdp_OnAttendeeConnected(object pAttendee){Console.WriteLine("{0}:rdp Viewing........",DateTime.Now.ToLongTimeString());RDPCOMAPILib.IRDPSRAPIAttendee att = pAttendee as RDPCOMAPILib.IRDPSRAPIAttendee;//设置viewer的权限，现在设置的为仅浏览att.ControlLevel = RDPCOMAPILib.CTRL_LEVEL.CTRL_LEVEL_VIEW;//设置rdp虚拟通道的权限，现在设置为发送和接收 virtualChannel.SetAccess(att.Id,RDPCOMAPILib.CHANNEL_ACCESS_ENUM.CHANNEL_ACCESS_ENUM_SENDRECEIVE);//throw new NotImplementedException();}

浏览端
添加引用：
axInterop.RDPCOMPAPILib.dll，动态创建 axrdpviewer

private static AxRDPCOMAPILib.AxRDPViewer axRDPViewer = new AxRDPCOMAPILib.AxRDPViewer();//必须接收到服务器端发送的连接字符串 rdpConnectString
axRDPViewer.Dock = System.Windows.Forms.DockStyle.Fill;
axRDPViewer.Size = new System.Drawing.Size(frm.Width, frm.Height);
axRDPViewer.OnConnectionTerminated += new AxRDPCOMAPILib._IRDPSessionEvents_OnConnectionTerminatedEventHandler(axRDPViewer_OnConnectionTerminated);
axRDPViewer.OnConnectionEstablished += new EventHandler(axRDPViewer_OnConnectionEstablished);
((System.ComponentModel.ISupportInitialize)axRDPViewer).BeginInit();
frm.Controls.Add(axRDPViewer);
((System.ComponentModel.ISupportInitialize)axRDPViewer).EndInit();
axRDPViewer.SmartSizing = true;
axRDPViewer.Connect(rdpConnectString, System.Guid.NewGuid().ToString(), "");
frm.ShowDialog();

各种事件

 void axRDPViewer_OnConnectionEstablished(object sender, EventArgs e){MessageBox.Show("Remote Viewer Viewing!");//send message through rdp ????RDPCOMAPILib.IRDPSRAPIVirtualChannel virtualChannel = axRDPViewer.VirtualChannelManager.CreateVirtualChannel("111", RDPCOMAPILib.CHANNEL_PRIORITY.CHANNEL_PRIORITY_HI, (uint)RDPCOMAPILib.CHANNEL_FLAGS.CHANNEL_FLAGS_LEGACY);virtualChannel.SendData("This is a test TEXT from Viewer!", (int)RDPCOMAPILib.RDPENCOMAPI_CONSTANTS.CONST_ATTENDEE_ID_EVERYONE, (uint)RDPCOMAPILib.CHANNEL_FLAGS.CHANNEL_FLAGS_LEGACY);//throw new NotImplementedException();}private void frm_FormClosing(object sender,FormClosingEventArgs e){//MessageBox.Show("this form will closed,event:frm_closing"); try{axRDPViewer.Disconnect();}catch (Exception){//throw;}            System.Windows.Forms.Form f = sender as System.Windows.Forms.Form;f.Dispose();//动态创建的axRdpViewer，必须要有这个dispose来释放所有资源}void axRDPViewer_OnConnectionTerminated(object sender, AxRDPCOMAPILib._IRDPSessionEvents_OnConnectionTerminatedEvent e){System.Windows.Forms.Form f =((AxRDPCOMAPILib.AxRDPViewer)sender).Parent as System.Windows.Forms.Form;MessageBox.Show("Client Shutdown");//axRDPViewer.Disconnect();f.Dispose();f.Close();//throw new NotImplementedException();}