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koumodaki wrote: I have included objbase.h and ole32.lib in the workspace
In the workplace? Have you included the headers into the proper source files?
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
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Yes I have...declarations are in stdafx.h and my applications cpp has this file included
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koumodaki wrote: #define _WIN32_WINNT = 0x0500
The first problem is you need to remove the equals sign from the second #define.
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Hi
I'm working on a program which connects to a machine and then has to do provisionning. For the moment the connection works. I work with an API which operates with requests and confirmations. Each composant of the API implements 3 interfaces : an interface for the request Ixxx, an interface for the events IxxxEvents and the IUnknown interface (COM/DCOM).
I can do all the requests I want. But my problem is, I have never a confirmation. The confirmations are fontions which have to be implemented but, if i do right understand, that I don't have to call.
I saw in COM/DCOM documentation that I had to create connection points in order to receive automatically the confirmations corresponding to the requests. I think my error is in the Advise() function. I don't know what I have to pass for the first parameter in this function.
I saw on internet that the first parameter is a pointer on the IUnknow interface of the sink object. But I don't really understand what is the sink object here. Do I have to create a class ? A class that inherits from something ?
I don’t understand also how I have to implement the QueryInterface method() in the case of the IID is the IUnknown identifier.
Here is a portion of my code for the connection points, the 2 interfaces are ITCSUser and ITCSUserEvents.
HRESULT hres;
IConnectionPoint* m_pITCSUserCP;
DWORD m_UserEventsCookie;
IUnknown * pIUnknown = NULL;
hres = pITCSUser->QueryInterface(IID_IUnknown, (void**)&pIUnknown);
hres = GetConnectionPoint(__uuidof(ITCSUserEvents), pITCSUser,&m_pITCSUserCP);
if (SUCCEEDED(hres))
{
m_UserEventsCookie = 0;
hres = m_pITCSUserCP->Advise(pIUnknown, &m_UserEventsCookie );
}
// Finds a connection point (riid) from an interface.
HRESULT GetConnectionPoint(REFIID riid, IUnknown* pObj,
IConnectionPoint** pCP)
{
IConnectionPointContainer* pCPC = NULL;
HRESULT hRes = pObj->QueryInterface(IID_IConnectionPointContainer,
(void**)&pCPC);
if (SUCCEEDED(hRes))
{
hRes = pCPC->FindConnectionPoint(riid, pCP);
}
pCPC->Release();
return hRes;
}
STDMETHOD(QueryInterface)(REFIID iid, LPVOID* ppv)
{
if ( iid == __uuidof(ITCSUserEvents) )
{
*ppv = static_cast<itcsuserevents*>(this);
}
else if ( iid == __uuidof(ITCSDataEvents) )
{
*ppv = static_cast<itcsdataevents*>(this);
}
else if ( iid == __uuidof(ITCSRadioSubscriberManagerEvents) )
{
*ppv = static_cast<itcsradiosubscribermanagerevents*>(this);
}
else if ( iid == __uuidof(ITCSGroupManagerEvents) )
{
*ppv = static_cast<itcsgroupmanagerevents*>(this);
}
else if ( iid == __uuidof(ITCSSystemManagerEvents) )
{
*ppv = static_cast<itcssystemmanagerevents*>(this);
}
else if ( iid == __uuidof(IUnknown) )
{
*ppv = static_cast<itcsuserevents*>(this);
}
else
{
*ppv = 0;
return E_NOINTERFACE;
}
return S_OK;
}
Thanx in advance !!
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Nath9999 wrote: But my problem is, I have never a confirmation. The confirmations are fontions which have to be implemented but, if i do right understand, that I don't have to call.
You need to add the function declration in the component for the dispatch Interface and Click "Implement Connection Points" by right clicking on the coclass.Then you will get the Fire event for the method which calls the client function.
Nath9999 wrote: Do I have to create a class ? A class that inherits from something ?
Yes ,you need to derive a class from CCmdTarget and call the Advise and Unadvise Member functions.This class is known as sink class.You write the Fire Method implementation in the sink class(This will be called by Component).
"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"
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I resolved the problem for reading registry (see last entry for that problem) and now I have the following error when trying to run the COM. This error occurs in main() method for my .exe project as follows:
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
****HERE**** Application.Run(new FormXXXXXCS());
}
The runtime has encountered a fatal error. The address of the error
was at 0x7f5dd68b, on thread 0xdf4. The error code is 0xc0000005.
This error may be a bug in the CLR or in the unsafe or non-verifiable
portions of user code. Common sources of this bug include user
marshaling errors for COM-interop or PInvoke, which may corrupt the
stack.
Does anyone know what is causing this and how to solve.
Michael
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0xc0000005 is access violation. Possibly in the COM component being accessed.
If you can post the call stack, we can find the cause. Do you have source code of COM compoent?
Also, are you using COM Events?
Sohail
modified 21-Apr-21 21:01pm.
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No I don't have the source code. The COM works fine if executed from an .exe project but not as a Library, why would that be.
Michael
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If the COM wroks fine in Exe and not as a library then finger point to the marshalling problem, can you please check whether the library and the application loads in the same AppDomain
Regards,
Sunil Tonger
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Since I am new to COM programming, I would like to know, Why we need COM? What is the advantage of using COM? And what is the difference between COM and COM+?
Please provide me if any link is avilable for the above questions.
Thanks in Adv,
Nandu
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Sounds like a university project to me...
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Wow, for your wide questions you should reed INSIDE COM to get little answer.
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Hi,
When I am trying to automate MS Word (32 bit) from a NT Service (32 bit) using COM.
The word runs as a 64 bit application (as evident from the task manager).
But if the same code is run as a thread from a Windows application word runs as 32 bit.
How can I automate word to run as 32 bit from the NT sevice??
Thanks,
Indra
code that I am using:
VARIANT root[64] = {0}; // Generic IDispatchs
VARIANT parm[64] = {0}; // Generic Parameters
VARIANT rVal = {0}; // Temporary result holder
int level=0; // Current index into root[]
// Initialize the OLE Library...
OleInitialize(NULL);
// Line 1: Set oWord = CreateObject Word.Application
CLSID clsid;
CLSIDFromProgID(L"Word.Application", &clsid);
HRESULT hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER|CLSCTX_INPROC_SERVER, IID_IDispatch, (void **)&rVal.pdispVal);
rVal.vt = VT_DISPATCH;
VARIANT oWord = {0};
VariantCopy(&oWord, &rVal);
VariantClear(&rVal);
// Line 2: oWord . Visible = 1
rVal.vt = VT_I4;
rVal.lVal = 0;
VariantCopy(&root[++level], &oWord);
hr = AutoWrap(DISPATCH_PROPERTYPUT, NULL, root[level].pdispVal, L"Visible", 1, rVal);
VariantClear(&root[level--]);
VariantClear(&rVal);
// Line 3: oWord . Documents . Open C:\\Test.doc
VariantCopy(&root[++level], &oWord);
hr = AutoWrap(DISPATCH_PROPERTYGET|DISPATCH_METHOD, &root[level+1], root[level++].pdispVal, L"Documents", 0);
The purpose of the AutoWrap function in this sample is to wrap the calls for GetIDsOfNames and Invoke to facilitate automation with straight C++.
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indra20 wrote: The word runs as a 64 bit application (as evident from the task manager)
No, it doesn't. Microsoft do not make 64-bit binaries available for Word 2007 since Word does not benefit from the increased address space. Earlier versions of Word predate x64 versions of Windows.
It's much more likely that Task Manager does not detect the 'bitness' of the WINWORD.EXE process correctly when launched in the non-interactive session.
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No, I think there is some issue with the way word is automated from the service.
Even when I let the service interact with the desktop, in the task bar it still shows WinWord as a 64 bit application.
When I try to print the document in automated code I get the error:
IDispatch::Invoke("PrintOut"=000001c0) failed w/err 0x800a1414
The very same code when run from the thread prints the word document fine.
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Hi,
I have a .Net application set up for COM/COM+. This component has a function that returns an array of a specific type/object. I use a VB6 application to call the function. The function works a supposed when the .net component is only installed in COM (regasm/gacutil), but when I setup and install the application for COM+ (regsvcs/gacutil), the VB6 test application crashes when I try to read data from the object/type in the array (e.g temp_str = myObjArr(0).myStr). I can read the size of the array using UBound without any problems, tough.
The error I get is the standard windows error "Visual Basic has encountered a problem and needs to close. We are sorry for the inconvenience."
Is there a known issue with passing array of objects from .net to vb6?
Thanks in advance!
BR
Øivind
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Previously someone here asked about the following:
why the Exception Retrieving the COM class factory for component with CLSID failed due to the following error: 80004005. occurs how to resolve this.
The response was to look at the constructor of the COM object if posible, however I do not have access to the code. Other people have no problem reading this COM, could I be having a problem because my OS and IDE are both 64 bit and I am trying to read a VB6 COM object. How can I get around this problem if it is because of the 64 bit, if not what else is the possibility. What are my options, can I change a Library into 32 bit (I am using VS2005 Pro 64), build a Dll and hook into it. What would be the best way to approach this whether it is the problem I mentioned or otherwise.
Thanks in advance,
Michael
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MAW30 wrote: Previously someone here asked about the following:
why the Exception Retrieving the COM class factory for component with CLSID failed due to the following error: 80004005. occurs how to resolve this.
The response was to look at the constructor of the COM object if posible
I mentioned about looking into COM coclass constructor because -
Few months back, the application I was once working on, was calling a COM object created in VB6. Now although the component was registered I got a standard COM error, if I am not wrong it was "Class not registered" error.
After a lot of digging in, I looked at VB6 code and found out that the constructor was raising an exception but somewhere in the process this error was mapped to "Class not registered". The reason for raising an exception was that some environment variable was not set.
MAW30 wrote: Other people have no problem reading this COM, could I be having a problem because my OS and IDE are both 64 bit and I am trying to read a VB6 COM object.
Likely, I do not have 64-bit PC with me at the moment so can't tell you exact results. VB6 COM component being 32 bit is likely to be the cause. It will help if you can have 64 bit version of same component. How do you run your application - from commandline or explorer? I have seen some VBScripts failing because wrong version of CScript.exe was executed because of the flavor (32 bit / 64 bit) of command prompt.
Sohail
modified 21-Apr-21 21:01pm.
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This was my exact message below:
Retrieving the COM class factory for component with CLSID {31C0BC9B-2250-4964-A582-BA03058BAC93} failed due to the following error: 80040154.
Though when I look in the registry it is there.
I do not have access to the code nor will I be able to get the COM in a 64 bit version. What do you suggest I do. Is it possible to setup a Library as 32 bit where the rest of the solution is in 64 bit.
Thanks,
Michael
-- modified at 2:36 Tuesday 24th July, 2007
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MAW30 wrote: Retrieving the COM class factory for component with CLSID {31C0BC9B-2250-4964-A582-BA03058BAC93} failed due to the following error: 80040154.
Though when I look in the registry it is there.
HRESULT 80040154 = REGDB_E_CLASSNOTREG - is what I was talking about
MAW30 wrote: I do not have access to the code nor will I be able to get the COM in a 64 bit version. What do you suggest I do. Is it possible to setup a Library as 32 bit where the rest of the solution is in 64 bit.
I would suggest, make a sample application to use your COM component. This application must be 32-bit. Test.
Also, as I mentioned earlier, does your component require you to do some initial setup in registry etc? If yes, then check wether you have everything in place. You could monitor registry using Sysinternals RegMon tool[^].
If I were you, I would first try compiling my application as 32-bit and use the COM component. This will help identify whether the problem is because of 32bit 64bit portability.
Sohail
modified 21-Apr-21 21:01pm.
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Error code 80004005 is the generic COM error code E_FAIL. Most likely the class is registered properly, but the DLL's DllGetClassObject function returned E_FAIL.
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The following is the results I get from a test I ran for RegMon, therefore it does not see the class as being registered at all.
This is the Regitry Monitor result (RegMon reported it NOT FOUND 3x before I received the error message)
72.23125458 MBTest.vshost.e:2632 OpenKey HKCR\CLSID\{31C0BC9B-2250-4964-A582-BA03058BAC93} NOT FOUND
This is the Registry entry under Software
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{31C0BC9B-2250-4964-A582-BA03058BAC93}
I also tried Late Binding and it said the file was not found.
I will work on a 32 bit program and see if that works.
Michael
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I resolved this problem by setting the Platform from Any CPU to x86.
Thanks for the help,
Michael
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MAW30 wrote: Platform from Any CPU to x86
That's what I meant when I said 32-bit version of your application.
Sohail
modified 21-Apr-21 21:01pm.
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