casting error while creating RDP connection

Question

I am trying to create some RDP client with Windows form anf AxMsTscAxNotSafeForScripting

rdpList = new List<AxMsTscAxNotSafeForScripting>();


public bool addRDP(string ip, string username, string pass)
    {
        for (int i = 0; i < number ; i++)
        {

            if (_rdpList[i].Connected.ToString() != "1")
            {
                try
                {
                    _rdpList[i].Server = ip;
                    _rdpList[i].UserName = username;



                    IMsTscNonScriptable secured = (IMsTscNonScriptable) _rdpList[i].GetOcx());
                    secured.ClearTextPassword = pass;
                    _rdpList[i].Connect();
                    _picList[int.Parse(_rdpList[i].Name)].ImageLocation = greenPath;
                    return true;

                }
                catch (Exception Ex)
                {
              
                }
            }
        }

I call this method from thread and when it try to do `:IMsTscNonScriptable secured = (IMsTscNonScriptable) _rdpList[i].GetOcx());`

It fails with the following error :

Unable to cast COM object of type 'System.__ComObject' to interface type 'MSTSCLib.IMsTscNonScriptable'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{C1E6743A-41C1-4A74-832A-0DD06C1C7A0E}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

I working on it all day long but I couldn't understand the issue?

The weird thing is if I invoke this method from windows form event ( such as button click) EVERY this work fine the only issue occur when i invoke this method from my WCF service.

Please help.

Answer 1

Hi,

What is the AxMsTscAxNotSafeForScripting?

As the error message said, there is no such interface.

Have a nice day.

---

Ghost,
Call me ghost for short, Thanks
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