Questions tagged [iconnectionpoint]
13 questions
6
votes
1 answer
Problems calling IConnectionPointImpl interface from C++ invoked via modal WinForms
We have a native C++ application which supports some VBA macros of various types over COM. One of these types, VBAExtension, registers itself with the core C++ application, resulting in an instance of (a class derived from)…
Chowlett
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4
votes
2 answers
What is IconnectionPoint and EventHandling
Trying to understand What is IConnectionPoint and how this is connected to IConnectionPointContainer,IEnumConnectionPoints,IEnumConnections and EventHandling.
Read the artcicles from MSDN and CodeProject which is explaining a about other methods…
Simsons
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2
votes
2 answers
Setting a WPF button to visible within an IConnectionPoint event handler
I'm fairly new to C# and WPF programing and right now this problem is giving me headaches.
What the program should do: The program displays a welcome screen with a text box, where a customer can enter his name.
If the device comes near a Wireless…
lx.
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2
votes
1 answer
E_ACCESSDENIED exception when attaching to an event in a COM server from .NET
I have a C++/ATL COM server that implements IConnectionPoint events. My client is a C# application that attaches to the events. When the COM server is created as a SYSTEM service, the client can properly attach to the event. When the COM server…
user386931
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1
vote
1 answer
Unexpected IConnectionPointImpl::Unadvise call on Windows Embedded Compact 7
We have a bigger software running on Win CE6 without problems. The core functionality is implemented in a COM server DLL that provides connection points. The COM client program registers event handlers for the connection points on program startup to…
KBO
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1
vote
5 answers
Connect to COM events in C# - support both managed and unmanaged servers
I'm writing C# code that needs to connect to COM events. I implemented the use of
IConnectionPointContainer and IConnectionPoint thus:
IConnectionPointContainer connectionPointContainer = internalGenerator as IConnectionPointContainer;
…
Inbar Shani
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1
vote
0 answers
FindConnectionPoint method returning null connection point
I found this POST which near about resembles my code while doing COM Interop Event Handling using IConnectionPoints Interface.
Please suggest me if you have any information related to this topic.
I know that FindConnectionPoint returns NULL if there…
Pratik Pattanayak
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1
vote
1 answer
How to deregister correctly from receiving notifications using IConnectPoint Unadvise?
In the documentation for Mobile Broadband API, it says:
The following procedure describes how to register for notifications.
1.Get an IConnectionPointContainer interface by calling QueryInterface on an IMbnInterfaceManager > object.
2.Call…
user1725145
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0
votes
1 answer
IConnectionPoint::Advise does not work any more in Windows 10 "1903" from the non-main thread
We have an application that either runs some COM hosting in the main thread or in a different thread (async), and we would like to connect to this (connectable) object by using the standard ConnectionPoint interfaces in order to get its events.
Up…
chksr
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0
votes
1 answer
InvalidCastException when setting up handler for COM event
I have an unmanaged C++ COM server that is setup to fire events, and i am trying to handle these events from my C# app.
However, I get an InvalidCastException when setting up the handler
myCOMObj.MyCOMEvent += new…
David A.
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0
votes
2 answers
How do I do ConnectionPoint in Delphi?
I'm writing a DLL which talks to Excel via its IDispatch interface. From VBA I pass in a Variant containing Application.Caller from which I draw the IDispatch pointer via .pDispVal.
What I'd like to know is how to query the interface via that…
bugmagnet
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0
votes
1 answer
Handle c# fired events in firebreath PluginAPI.cpp using COM Callable Wrapper
Does JSCallBack in Firebreath help in this matter?Because what I just saw it only handles events occured in the firebreath(native c++) project.Am I right here?
I used the concept of IConnectionPoint interface to establish a connection with the…
Pratik Pattanayak
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-1
votes
2 answers
Automation object leaks memory (TConnectionPoints)
I have an automation object with event support that leaks memory. The FConnectionPoints which comes with the generated source is never freed. When I manually add FConnectionPoints.Free in the destructor, the leak goes away.
I am on Delphi 7, using a…
The_Fox
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