Calling CoCreateInstance in C# (C++ to C# migration)
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Thread: Calling CoCreateInstance in C# (C++ to C# migration)

  1. #1
    Join Date
    Mar 2010

    Calling CoCreateInstance in C# (C++ to C# migration)

    Hi all,

    I am migrating some code from C++ to a C# WebService, and specifically I use CoCreateInstance in the C++ code. I have two questions that interests me:

    1) Is it possible to integrate a C++ code into the C# code?

    2) If not, is there an equivalent CoCreateInstance in C#?

    For more info, I import two files which are #include "SmsMsgAPI.h", #include "SmsMsgAPI_i.c". Then the CoCreateInstance looks like this:

    sLocationRequest = sNewLocationRequest.AllocSysString();

    sMPIPAddress = sMPIP.AllocSysString();



    //Create root messaging object

    _CHECKHR( ::CoCreateInstance(





    (LPVOID*)&pMessaging) );

    //Create message object for request

    _CHECKHR( pMessaging->CreateMessage(&pRequest) );

    //Set the target of the message to the Location Manager endpoint

    _CHECKHR( pRequest->SetTargetEndpoint(L"MP_LocationManager") );

    //Set the message body with the request

    _CHECKHR( pRequest->SetBodyFromString(sLocationRequest) );

    // Invoke the targeted endpoint on the local machine with the request,

    // and retrieve the reply.

    _CHECKHR( pMessaging->Invoke(sMPIPAddress, pRequest, &pReply) );

    // Extract body from reply message.

    _CHECKHR( pReply->GetBodyToString(&pszReplyMessage) );

    wprintf(L"\n\nReply from MP:\n%s", (wchar_t *) pszReplyMessage);


    Thank you in advance!

  2. #2
    Join Date
    Mar 2010

    Re: Calling CoCreateInstance in C# (C++ to C# migration)

    Hi, I finally solved this problem:

    Here is a link that helped me with how to use the Management Point API in C# : and

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