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I can use an out-of-process COM server that is not registered with C# dynamic, and this works fine, but I cannot get events to work. My code basically is something like this: Process.Start("path\\...
Martin's user avatar
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3 votes
1 answer
68 views

The following code returns a list of cell dependent addresses; however I need the dependent addresses to be in External format (include workbook name and worksheet). I am trying to set the optional ...
en0386's user avatar
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1 vote
1 answer
84 views

Generally, a method cannot be added to an existing vtable COM interface or dual COM interface, because there may be a derived interface, so expanding the base interface breaks its layout. But can a ...
Alex Guteniev's user avatar
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1 answer
122 views

Motivation: I got IDispatch pointer as a result of my efforts that I have described in my previous question How to access workbooks from the ExcelApplication Delphi COM reference, currently there is ...
TomR's user avatar
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2 votes
1 answer
528 views

I have known that a class like blow will auto implement IDispatch interface: [ClassInterface(ClassInterfaceType.AutoDual)] [ComVisible(true)] public class Test { } Now my need is to override the ...
yunate's user avatar
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2 votes
1 answer
106 views

I have a function that returns an OleVariant that contains an IDispatch reference counted object: class function TGrobber.Make: OleVariant; begin Result := (TGrobber.Create as IDispatch); // ...
Ian Boyd's user avatar
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1 vote
1 answer
907 views

I have a COM object which exposes a function. I would like to pass parameters to this function and receive a return value. I'm using C++ with CoCreateInstance(). The error I receive is: hr = ...
Gary's user avatar
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0 answers
163 views

The project is a Class Library which I want to use it from a Visual Foxpro application. Visual Foxpro is 32bit. .Net project: Target framework .Net Framework 4.7.2 Target Platform x86. Using ...
Rajesh Karunakaran's user avatar
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1 answer
464 views

.NET 6 has trouble calling its own IDispatch objects, if marshaled. To reproduce: if (Array.IndexOf(Environment.GetCommandLineArgs(), "/s")>=0) //Server { Thread t = new Thread(new ...
Seva Alekseyev's user avatar
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2 votes
1 answer
177 views

Update 2021-04-20: The code presented here is for illustration purposes only. As pointed out by Simon Mourier, for marshaling in-process of such a simple class there is no need for all the TLB ...
Michael Bikovitsky's user avatar
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2 votes
1 answer
167 views

I'm using a TWebBrowser to display a WYSIWYG HTML editor and I've added some handlers to catch keyboard and mouse events so I can integrate this editor into my application flow. This browser is ...
Héctor C.'s user avatar
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2 votes
1 answer
497 views

If I create a COM-visible VB.NET interface, such as: <ComVisible(True)> Public Interface IMyInterface Sub MyMethod() End Interface Then the resulting type library will show IMyInterface ...
tenfour's user avatar
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1 vote
1 answer
425 views

The QueryInterface() log of an instrumented IDispatch-based COM object accessed in C# via a dynamic variable showed (among others) the unknown IID {B86A98CC-DCC0-3205-8777-7911A07DAAAF}. Google, ...
DarthGizka's user avatar
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2 votes
1 answer
543 views

I have a COM project which does not support MFC and needs to communicate with another App through a MFC interface. I cannot use directly in MFC interface with my COM project as it is not an MFC ...
firehelm's user avatar
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3 votes
1 answer
771 views

I'm unable to successfully invoke create_session member. It's return Type mismatch // COM class -> member virtual HRESULT __stdcall create_session( /*[in]*/ BSTR pbszName, /*[in]*/ ...
Rajib Chy's user avatar
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1 vote
1 answer
445 views

I am a C programmer, but I am new to Windows & COM programming. For the following C# code: //Change the font of the selected text in the running PowerPoint. Application app = Marshal....
張俊芝's user avatar
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0 answers
355 views

I have 3 interfaces: IGetInformation, IAccount, ICreateATM and they inherit IDispatch. Also i have class CoATM that inherits these 3 interfaces. How should I implement IDispatch for all my interfaces ...
Mental's user avatar
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1 vote
0 answers
132 views

Excel.Application.Run and VBA.Interaction.CallByName both seem to do similar things; namely calling a method using a string name. As I understand it, this functionality is enabled because VBA is an ...
Greedo's user avatar
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1 vote
0 answers
168 views

Microsoft's documentation states that Asynchronous support is not available for IDispatch or for interfaces that inherit IDispatch ...but I want to do exactly that (to call Excel asynchronously from C+...
Nicholas White's user avatar
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0 votes
1 answer
56 views

I have a C# COM Add-in which inserts custom HTML into the body of the email. Using OutlookSpy, I see the following events have fired: PropertyChange (To) PropertyChange (CC) PropertyChange (BCC) ...
ezG's user avatar
  • 441
1 vote
1 answer
799 views

I am trying to communicate with a COM application using PowerShell. When I instantiate it, I can only talk to it through the IDispatch interface. That in itself is interesting, because I can early-...
Rno's user avatar
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1 vote
0 answers
312 views

I'm trying to create a COM server in C# to expose an OLE automation object. I'd like to implement the IDispatch interface manually, since I need to do some amount of dynamic lookup for the members. ...
Delusional Logic's user avatar
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0 votes
1 answer
1k views

This is a Sage cloud 2019 Business Object Interface question. I'm experiencing issues trying to new up an AR_Customer_bus object, my eventual aim is to be able to create a new customer using the BOI. ...
HQ216493's user avatar
  • 13
0 votes
2 answers
732 views

I'm calling a COM function that requires a wchar_t** argument. What I would like to do is: wchar_t* arr[3] = {L"str1", L"str2", L"str3"}; What I get back is a const wchar_t**, which the compiler ...
c2po's user avatar
  • 13
0 votes
1 answer
230 views

I'm trying to sink DShellFolderViewEvents using the ATL, and the only method I've been able to successfully subscribe to is DISPID_SELECTIONCHANGED. There appear to be many other events listed in the ...
user avatar
0 votes
1 answer
566 views

I'm trying to call a registered COM interface (Inproc dll) in an Eclipse C++ environment (MinGW GCC toolchain). I therefore don't believe that I can simply import the dll typelib the way I typically ...
forother's user avatar
  • 39
2 votes
0 answers
8k views

The error shown in the following screen shot occurs sporadically: The application itself is in unmanaged C++, using COM objects, and .NET objects (in C# and VB) via COM interop. Only two functions ...
Phil Jollans's user avatar
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0 votes
0 answers
442 views

I want to implement a custom timeout for my wrapper class. This code is working but without timeout :/ Let see what I've implemented: Definition: TComplusWrapper = class(TObject) private ...
Exe's user avatar
  • 1
0 votes
2 answers
308 views

I would like to understand the purposes of the files mentioned in this article and link the knowledge to my current COM server and COM client scenario, so that I can implement my COM server to use the ...
Nick Chang's user avatar
  • 1
-1 votes
2 answers
1k views

i want to pass a com object instance as a variant parameter to another active x object function, for that i need to convert the idispatch pointer to a variant? i am not sure. hr = CoInitializeEx(...
Alok Saini's user avatar
  • 311
0 votes
0 answers
632 views

VS2015 C++ / Windows7 SP1 Considering the following code: CComPtr<IFontDisp> m_pFont; ::OleCreateFontIndirect(&fdesc,IID_IFontDisp,(void**)&m_pFont); VARIANT var = m_pFont; // PSEUDO ...
Zoli's user avatar
  • 961
0 votes
1 answer
419 views

I'm trying to find information on if the IDispatch interface throws, specifically if IDispatch::GetTypeInfo() does. IIRC, IDispatch::Invoke() can, but I can't seem to find anything on the subject and ...
Adrian's user avatar
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0 votes
0 answers
109 views

I want to call an method with invoke. My object input is a string that is address of a file in my computer and type of output is IDispatch. How I should define Disparams as an input of invoke. My ...
mahdi Lotfi's user avatar
  • 310
6 votes
1 answer
8k views

I applied Invoke to use object of an application in C++ but an error occurred. error:information not available, No symbols loaded for GPNSAutomation.dll My codes is : ::CLSIDFromProgID(OLESTR("...
mahdi Lotfi's user avatar
  • 310
2 votes
1 answer
1k views

I've a COM object for some simple mathematical utilities. Amongst others, it exports 2 interfaces - the IDL is as follows: interface IUnivariateFunction : IDispatch { HRESULT evaluate([in] double ...
DaveM's user avatar
  • 305
1 vote
1 answer
1k views

I have written some C# code which returns a .NET object to unmanaged code as an IDispatch pointer using Marshal.GetIDispatchForObject, however, this object also implements other (non .NET defined) COM ...
Marcus's user avatar
  • 6,125
0 votes
1 answer
1k views

I'm using MFC in Visual Studio 2015 on Windows 7 64Bit. In my application,there is an activeX control,I need to communicate between activeX control and my application. But activeX need my ...
Yao's user avatar
  • 1
0 votes
0 answers
1k views

I'm trying to invoke a IDispatch->Invoke call to get the name of the IDispatch object and the method fails with error DISP_E_EXCEPTION. The property I'm trying to get is "accName". Below is the code ...
Andrei's user avatar
  • 377
1 vote
1 answer
996 views

I have a Delphi XE2 application with a TEmbeddedWB that I use to simulate user actions. The application navigates to a URL, populates the relevant form fields with data and submits the data. The ...
JorgeJ's user avatar
  • 11
2 votes
1 answer
806 views

So, I am trying to automate Excel from C++ and OLE, using the Autowrap function provided by Microsoft in their automation examples. I have gotten as far as that I can read a string value from a cell ...
Prof. Falken's user avatar
  • 25.1k
0 votes
1 answer
239 views

So the program I'm working on creates a dynamic .Net assembly from source code that the user enters into a text editor (using CodeDOM as a compiler). I need to get an IDispatch for this assembly that ...
Brandon Gurwitz's user avatar
  • 13
1 vote
2 answers
196 views

I have a Windows Service that is exposing some COM functions to be invoked via IDispatch Invoke. There are different clients (Windows applications) that at any moment can Invoke any of these functions....
IMR's user avatar
  • 56
1 vote
0 answers
371 views

I have a COM class which is accessible only via vtable. It is already distributed to clients. I am planning to allow script access as well, by introducing IDispatch. In my local tests, it shows ...
Logan's user avatar
  • 194
1 vote
0 answers
2k views

In advance sorry for the TOO Long post, but given that there are many parts involved, and I am not sure where I can be making a mistake, hence, I need to post all the parts involved. Please do not ...
IMR's user avatar
  • 56
1 vote
2 answers
638 views

Here is the IDispatch interface I got from the type library: interface IMYPhoneCmd : IDispatch { [id(0x00000001), helpstring("method CallSet")] HRESULT CallSet( [in] BSTR* ...
Anarkie's user avatar
  • 675
1 vote
1 answer
623 views

I'm stuck on this one. Given three variables: an IDispatch* to a connectable object the IID (DIID) of an outgoing dispinterface on that object the name of a member defined by the dispinterface How ...
Michael Gunter's user avatar
  • 12.9k
2 votes
1 answer
741 views

In a c# com interface, one can define a default member like this [InterfaceType(ComInterfaceType.InterfaceIsDual)] [ComVisible(true)] public interface IMyComClass { [DispId(0)] string Item{get;} }...
ekt's user avatar
  • 146
0 votes
0 answers
531 views

I have created a DLL that starts up a thread which polls a usb device, when the DLL gets a message from the USB device it calls a callback function. Using this dll in code consists of creating an ...
Perry Ward's user avatar
  • 15
2 votes
1 answer
4k views

There are many examples of how to call IDispatch::Invoke with a BSTR* parameter. I have this working with many other "SomeType*" parameter but no matter what I try, I either get HRESULT of Type ...
user3739214's user avatar
  • 91
2 votes
0 answers
451 views

This my IDL file. IFrame is a dual interface and inherits both IDispatch and IUnknown. [ object, uuid(C5AD0517-37FC-479C-9C7A-A063B17E4A2E), dual, nonextensible, pointer_default(...
user3707763's user avatar
  • 151

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