Send Ctrl+Alt+Del command to RDP ActiveX


  • Hi all,


    I am creating a custom version of VMCONNECT.EXE to connect users to Hyper-V guest VMs.  I've got it all working, except when the user connects to a machine that isn't logged in.  I cannot send the Ctrl+Alt+Del command to the RDP ActiveX control.


    Current code as follows: 

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;

    namespace RDPTest
        public partial class Form1 : Form
            public Form1()

            private void button1_Click(object sender, EventArgs e)
                // MessageBox.Show("Clicked");

                //specify the server the VM is running on
                axMsRdpClient8NotSafeForScripting1.Server = "x.x.x.x";

                //enable relative mouse mode and smart sizing
                axMsRdpClient8NotSafeForScripting1.AdvancedSettings7.RelativeMouseMode = true;
                axMsRdpClient8NotSafeForScripting1.AdvancedSettings7.SmartSizing = true;

                axMsRdpClient8NotSafeForScripting1.AdvancedSettings8.DisableCtrlAltDel = -1;

                //specify the authentication service - this is required and set the authentication level
                axMsRdpClient8NotSafeForScripting1.AdvancedSettings7.AuthenticationServiceClass =
                    "Microsoft Virtual Console Service";
                axMsRdpClient8NotSafeForScripting1.AdvancedSettings6.AuthenticationLevel = 0;

                //retrieve the activeX control and enable CredSSP and disable NegotiateSecurity
                MSTSCLib.IMsRdpClientNonScriptable3 Ocx =
                Ocx.EnableCredSspSupport = true;
                Ocx.NegotiateSecurityLayer = false;

                //retrieve the activeX control and disable CredentialsDelegation
                MSTSCLib.IMsRdpExtendedSettings rdpExtendedSettings =
                object True = true;
                rdpExtendedSettings.set_Property("DisableCredentialsDelegation", ref True);

                //set the RDPPort and set the PCB string to the VM's ID
                axMsRdpClient8NotSafeForScripting1.AdvancedSettings2.RDPPort = 2179;
                axMsRdpClient8NotSafeForScripting1.AdvancedSettings7.PCB = "MACHINE GUID";    

                //connect to the VM



    As you can see there I have tried to use the "DisableCtrlAltDel" command, however this doesn't seem to do anything.

    Any help would be much appreciated.


    Thursday, December 12, 2013 3:44 PM


  • Hi chriwall,

    I am not familar about your issue, but as far as I know that a slightly different keyboard shortcuts are used when applied to a remote desktop session window. If you want to send ctrl+alt+del command to remote desktop session windows, please ctrl+alt+end.

    The following articles are for your reference.

    How to Press and Send Ctrl-Alt-Del in Remote Desktop Connection Window:

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    Friday, December 13, 2013 2:15 AM