COM

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Re: FINISHED! Joao Vaz16-Jan-02 22:35 Joao Vaz 16-Jan-02 22:35  Good for you Tim Rymer COM it's a beast to learn ,I readed 8 books on COM/ATL to be proficient Regards and happy COM coding Joao Vaz How to set the identity user of a COM component xicoloko16-Jan-02 2:28 xicoloko 16-Jan-02 2:28  Hi, How to set the identity user of a COM component using VC++? Thanks, - xico - CAxDialogImpl<> and MS Word macro MECVA15-Jan-02 8:21 MECVA 15-Jan-02 8:21  Hi, I created a dialog box using the ATL Object Wizard choosing the category Miscellaneous and the object type Dialog. The result of this action was a dialog implemented by a class that specializes the template CAxDialogImpl<...>. This dialog is showed in a method of another COM object created as SimpleObject. The SimpleObject component is instantiated in an MS Word macro. When I install my program in a machine without Visual C++ installed the program breaks down. I am sure that the COM support is installed, because when I run another component in the same way, but not using this kind of Dialog, the program does not break down. Can anybody help me? Thanks in advance, Márcio Azevedo. Re: CAxDialogImpl<> and MS Word macro Not Active15-Jan-02 9:09 Not Active 15-Jan-02 9:09  Make sure your components have been built in release mode not debug. Does your dialog use any controls that have been installed on the build machine but not on the target? Re: CAxDialogImpl<> and MS Word macro Michael P Butler15-Jan-02 22:21 Michael P Butler 15-Jan-02 22:21  How was the object compiled. Release Min Dependancy or Release Min-Size? Min-Size requires ATL.DLL to be registered on the system. What about the run-time library version it was compiled with, was it Multi-threaded. I've had some problems with systems missing msvcp60.dll Michael Connection Points with Variant Parameter AndyC14-Jan-02 22:03 AndyC 14-Jan-02 22:03  I am try to pass a variant as a parameter on a connection point, but at the moment I am having little success. Does any body have any idea if I can do this ? Deleting the mutiple instances of COM object Ebin14-Jan-02 19:52 Ebin 14-Jan-02 19:52  We have implemented a com client in VC++ and it should communicate with server that developed in Delphi(.dll). The Scenario is as folows ------------------------------------- A button click on com client(vc) will invoke the com server (Delphi interface). which will display a dialog were user can interact.Thus by the button click on VC client can invok multiple instances of delphi server. Now we need to delete or close all the instances of com server with a single click in vc client (com client) how it is possible ?. Also there is problem of how the com client (VC) should identify any event occured, on which delphi interface. Is there any way of identifying it ?. HTML Control Printing Problem John Osborn14-Jan-02 16:29 John Osborn 14-Jan-02 16:29  If I use the ATL COM AppWizard to create an HTML Control and then embed it in a web page it shows up fine on the monitor, but never prints to the printer. Does anyone know what's going on with that? And while we are at it, the default HTML Control project generates a sample control with 3 buttons labeled Red, Green and Blue that when clicked generate the error "Object doesn't support this property or method". Has anyone else experienced this? Calls to _IOutBound from several threads Alvin77712-Jan-02 0:37 Alvin777 12-Jan-02 0:37  I have a VB application which uses COMponent written on VC++. COMponent implements IConnectionPoint and creates additional threads. Pointer to [source] interface _IOutBound is correctly marshalled between main thread and additional ones. The problem arises when VB calls Release (and --m_Ref==0). COMponent waits for threads to end and VB cannot serve call to _IOutBound since it is waiting in COMponent. And if one of the threads calling for _IOutBound - I got deadlock. How can I prevent that deadlock? -- Alvin777 DCOM and Connection Point 11-Jan-02 5:33 11-Jan-02 5:33  Hi, I'm having some problems using connection points with DCOM. I have an ATL component that contains a connection point used to send events back to the client. When I instatiate it locally it works, but when I instantiate it remotely an error (E_ACCESSDENEID) occurs calling the method DispEventAdvise of the client event handler passing the container component. Can anybody help me?!? Thanks in advance, Marcio Azevedo. Re: DCOM and Connection Point Joao Vaz11-Jan-02 7:29 Joao Vaz 11-Jan-02 7:29  Hi Marcio, Do you configured access control on the remote computer using DCOMCFG ? If not , it gives the infamous E_ACCESSDENEID Hope this helps, Joao Vaz ActiveX control works properly in VB, but not in VC++ sanskypotov11-Jan-02 0:55 sanskypotov 11-Jan-02 0:55  Hi, I am using a Audio Player ActiveX in VB and VC++ 6.0. In VB the control runs fine, but in VC++ the control freezes the window when I play a song. I'm using CreateInstance method in VC++ to instantiate the control Can someone tell me what I should do? Sansky Re: ActiveX control works properly in VB, but not in VC++ 11-Jan-02 2:26 11-Jan-02 2:26  Some controls do not have the "windowless activation" feature (they need a window to function correctly). This may or may not be your problem. Instead of CreateInstance, have you tried to insert the control onto a dialog template in your project? Assuming you are using the control in a CDialog derived class: 1. Click the project menu. 2. Select "Add to project" then "Component and controls". 3. Browse to select your ActiveX control. 4. The above steps will generate a C++ wrapper class derived from CWnd and also place the control on the resource toolbar, you can drag it from there onto your dialog template. 5. You can add a member for this control to your CDialog derived class. CComVariant and Streams Alberto Bar-Noy9-Jan-02 20:33 Alberto Bar-Noy 9-Jan-02 20:33  Hi all, I am suffering from a Read/Write stream operation with CComVariant. Here is the problem. I create a stream like this: CreateStreamOnHGlobal(NULL,TRUE,&m_pStream) then I write to it a VARIANT through CComVariant (in doesn't matter which type it is) like this m_comVariant = valToWrite;<br /> m_comVariant.WriteToStream(m_pStream); and read it like this: m_comVariant.ReadFromStream(m_pStream);<br /> *pvalToRead = m_comVariant; As a result in the read what I get is a "Bad varibale type" error I also tried this with CComBSTR and got the same results Any ideas? Thanks a million for any help Alberto Gattegno Software Engineer http://www.itgil.com COM+ and Win98 Reno Tiko9-Jan-02 19:47 Reno Tiko 9-Jan-02 19:47  Can Win98 clients use COM+ components on Win2000 and will the COM+ components still have the same benefits such as transactions, scalability, etc. managed automatically by COM+? Loading ActiveX from another ActiveX mad05039-Jan-02 16:03 mad0503 9-Jan-02 16:03  Hi , Is it possible to load other ActiveX controls from one ActiveX Control at run time. The ActiveX control I have to develop..whose responsibility is to load the other activeX controls and PASS parameters they require at run time The parameters I have to pass and the class ID of the control I will be getting from the html page in which my activeX control is present. For Example: <object classid="CLSID of My ActiveX control" width="300" height="250"> <param name="" "totalcontrolstoload"="" value="N" /> <param name="" "control="" id"="" value="ToLoad1" /> <param name="Control ID" value="ToLoad2" /> ....................... ....................... <param name="Control ID" value="ToLoad N" /> <object classid="CLSID of Some Active X control One" id="ToLoad1"> <object classid="CLSID of Some Active X control two" id="ToLoad2"> 1. Is it possible to for my ActiveX control to get the information of other activeX controls in the HTML page. 2. Is it possible to load the other active X controls using my control. 3. How do I communicate with other ActiveX controls... i.e I know control communicates with container...But how do two controls which are contained in the same container communicate with each other. Please send your Inputs/Suggestions /Improvements. Thanks in Advance, Raju Problem with registring server 9-Jan-02 5:47 9-Jan-02 5:47  Hi, I created an InProcServer(ToolBand.dll) on my Windows NT Wkts which works fine for NT Server4.0, Win98, 2K, and Me. This doesn't get installed on the setup of Win95 running IE5. I get error message "This function is only valid in Win32 mode". There were some "Ex" Registry API used in DllRegiserServer(). I've replaced it with normal API's i mean without "Ex", but the problem remains same. I get same error message with RegSetValue(..) API. Is there any compatibility issue? It seems that Windows 95 is not pure win32. Hey Any comments? Why its so ironical behaviour? Should I need to build this application on VC++ running on Windows 95? I there any registry key or service to get some Win32 services on Win95. I'm fed-up with this behaviour. Help me with any comments. --Sumit Deleting COM interfaces in C++ Twinnie9-Jan-02 3:04 Twinnie 9-Jan-02 3:04  Is there any simple way of deleting an ATL interface in a VC++ ATL project? I am a little loath to commenting out or deleting lines manually for the required interface. Declaring STL data structures and types in IDL Alberto Bar-Noy9-Jan-02 1:30 Alberto Bar-Noy 9-Jan-02 1:30  Hi all, This is a somewhat complex issue I guess and most probably the answer is no BUT i have to be sure. Is the any way at all to declare an STL data type inside an interface declaration? i.e interface FOO { [helpstring("method FOOFunc")] HRESULT FOOFunc([in]std::vector < std::string > stringVec); } If so please tell me how to declare and how to inlude the header files without the MIDL giving me comilation errors If not... well you can't balem me for trying. Thanks in advance. Alberto Gattegno Software Engineer http://www.itgil.com Re: Declaring STL data structures and types in IDL Michael P Butler9-Jan-02 4:02 Michael P Butler 9-Jan-02 4:02  No STL types aren't valid for COM. However http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/vcconimplementingstlbasedcollection.asp may be useful to you. Michael Re: Declaring STL data structures and types in IDL Alberto Bar-Noy9-Jan-02 4:14 Alberto Bar-Noy 9-Jan-02 4:14  Thanks!!!!!!!!!! You made my day (actualy my evening)!! I suspected that it would come to IEnumXXX at some point. Thanks again Alberto Gattegno Software Engineer http://www.itgil.com Re: Declaring STL data structures and types in IDL CodeGuy9-Jan-02 5:20 CodeGuy 9-Jan-02 5:20  The method I use in my apps is to call a function to copy my strings, vectors, etc. to IDL-compatible types before passing my data around via a COM method. Then I "unmarshal" the data back into strings, vectors, etc. on the other end. I use CComBSTR and Chris Sells's CComVector for the translation. CodeGuy The WTL newsgroup: over 1100 members! Be a part of it. http://groups.yahoo.com/group/wtl Writing a VERY simple COM Client Jeremy B8-Jan-02 7:53 Jeremy B 8-Jan-02 7:53  Hey all, I'm pretty new to COM programming in C++ (been doing it in VB for quite a while). I'm looking for an absolutely bare-bones, "instantiate one object, make one method call and spit out the results" snippet of code showing me how to write a C++ client app that uses a COM object. Like I said, doesn't have to be anything spectacular, I just want to see the steps involved in using a COM object in C++. I searched the site for simple examples, and even searched on the web some, but didn't find anything (if you know of any good examples, I would appreciate the URLs). Thanks in Advance Jeremy Re: Writing a VERY simple COM Client Michael Dunn8-Jan-02 9:59 Michael Dunn 8-Jan-02 9:59  Intro to COM part 1 perhaps? --Mike-- My really out-of-date homepage He who laughs last, didn't get the punchline and is just laughing so he won't look silly. Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan. Re: Writing a VERY simple COM Client Brian C Hart8-Jan-02 10:10 Brian C Hart 8-Jan-02 10:10  If you ever are interested in getting into DCOM, I have a start-to-finish tutorial on this site. It is very easy to follow, and is simple. All you do is write a COM object with one method. You call the method, and the method tells you, "Hello, World!". The tutorial starts at http://www.codeproject.com/com/HelloTutorial1.asp. I really recommend you follow straight through and build things yourself while following along. Hope this is a good intro! Really, the usefulness of COM comes out in doing things between more than one computer, but you can put both the "server" and the "client" together on the same computer and you still get everything. Hope it helps! Sincerely Yours, Brian Hart "And that's the news from Lake Wobegon, where all the women are strong, the men are good-looking, and the children are above-average." - Garrison Keillor

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