Re: ATL shell extension calls an ATL COM object but crashes after

From:

=?Utf-8?B?VGV4TWFncw==?= <TexMags@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.atl

Date:

Fri, 29 Feb 2008 06:30:06 -0800

Message-ID:

<7958C111-C1E5-4005-BCE9-6E4E0D146535@microsoft.com>

I assume you mean the .tlh file I have inside my project? Let me know if it's
something else that you mean.

It looks like this:
// Created by Microsoft (R) C/C++ Compiler Version 15.00.21022.08 (73fa1492).
//
// C:\DOCUME~1\Magnus\LOCALS~1\Temp\Myupload.tlh
//
// C++ source equivalent of Win32 type library MyUpload.dll
// compiler-generated file created 02/26/08 at 13:16:01 - DO NOT EDIT!

#pragma once
#pragma pack(push, 8)

#include <comdef.h>

namespace MyUploadLib {

//
// Forward references and typedefs
//

struct __declspec(uuid("cc8f95ec-01b0-454a-8973-09b35a46ca34"))
/* LIBID */ __MyUploadLib;
struct /* coclass */ MyUploadObj;
struct __declspec(uuid("45dbfcf5-d41d-4458-94c8-fe9df91ffcbe"))
/* dual interface */ IMyUploadObj;

//
// Smart pointer typedef declarations
//

_COM_SMARTPTR_TYPEDEF(IMyUploadObj, __uuidof(IMyUploadObj));

//
// Type library items
//

struct __declspec(uuid("6805d829-5a9f-4d36-adf5-78da0f16fd63"))
MyUploadObj;
    // [ default ] interface IMyUploadObj

struct __declspec(uuid("45dbfcf5-d41d-4458-94c8-fe9df91ffcbe"))
IMyUploadObj : IDispatch
{
    //
    // Wrapper methods for error-handling
    //

    HRESULT uploadFile (
        BSTR * filename );
    _bstr_t get_ErrorMsg ( );
    _bstr_t get_UploadStatusUrl ( );
    HRESULT authenticate (
        BSTR * env );

    //
    // Raw methods provided by interface
    //

      virtual HRESULT __stdcall raw_uploadFile (
        /*[in]*/ BSTR * filename ) = 0;
      virtual HRESULT __stdcall raw_get_ErrorMsg (
        /*[out,retval]*/ BSTR * errorMsg ) = 0;
      virtual HRESULT __stdcall raw_get_UploadStatusUrl (
        /*[out,retval]*/ BSTR * uploadStatusUrl ) = 0;
      virtual HRESULT __stdcall raw_authenticate (
        /*[in]*/ BSTR * env ) = 0;
};

//
// Wrapper method implementations
//

#include "C:\DOCUME~1\Magnus\LOCALS~1\Temp\Myupload.tli"

} // namespace MyUploadLib

#pragma pack(pop)

"SvenC" wrote:

Hi TexMags,

CComBSTR cbstrAuthEnv = "env1";
CComBSTR cbstrFilename = "C:\Test.doc";

CoInitialize(NULL);
MyUploadLib::IMyUploadObjPtr upload;

upload.CreateInstance(__uuidof(MyUploadLib::MyUploadObj));

You should do some error handling otherwise you could
use an invalid object in the next line.

upload->authenticate(&cbstrAuthEnv);
...
CoUninitialize();

It is when the call to authenticate that it normally crashes. Like I
mentioned earlier, the identical code runs fine if I have everything
inside the shell extension.

Please show the interface definition of IMyUploadObj and
your implementation of authenticate. If the crash happens
on that call I suspect the problem in that implementation.

--
SvenC