COM Discussion Boards

22-Oct-07 1:19

Glad I could help Smile | :)

Sohail

modified 21-Apr-21 21:01pm.

COM

Catharin18-Oct-07 1:09

18-Oct-07 1:09

When i executed VC++6.0 project(MFC and ATL application) i encountered an error message "COM Error: 0x80040154" .

Q. What the error means and how it can be solved?

User 21559718-Oct-07 6:00

18-Oct-07 6:00

Catharin wrote:
COM Error: 0x80040154

Corresponds to REGDB_E_CLASSNOTREG.

Quoting from MSDN,

REGDB_E_CLASSNOTREG
A specified class is not registered in the registration database. Also can indicate that the type of server you requested in the CLSCTX enumeration is not registered or the values for the server types in the registry are corrupt.

Sohail

modified 21-Apr-21 21:01pm.

Catharin19-Oct-07 1:16

19-Oct-07 1:16

What all steps are needed for solving the above scenario?

Re: COM [modified]

User 21559719-Oct-07 5:25

19-Oct-07 5:25

Catharin,

Check if the COM server is registered on your machine. If it's not, then register it.

Also you will need to explain a bit more about what code fails.

Sohail

modified 21-Apr-21 21:01pm.

User 21559721-Oct-07 22:39

21-Oct-07 22:39

Catharin,

Is the problem resolved?

Sohail

modified 21-Apr-21 21:01pm.

Catharin22-Oct-07 0:02

22-Oct-07 0:02

Sohail,

Not yet solved.

Let me explain the current situation. I created a sample C# class library project. The code is listed below:

COMServer:

using System;
using System.Runtime.InteropServices;

namespace MyComServer
{
public delegate void MyComEventHandler();

// Step 1: Defines an event sink interface to be implemented by the COM sink.
<Guid({16FA6CC7-E2B9-4326-9D4F-ADBAADA6627D})]
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIDispatch)]
public interface IMyComEvents
{ [DispId(1)]
void myComEvent();
}

// Step 2: Connects the event sink interface to a class by passing the namespace and event sink interface

[ComSourceInterfaces(typeof(MyComServer.IMyComEvents))]
public class MyComCls
{
public event MyComEventHandler myComEvent;
public MyComCls()
{}
public void raiseMyComEvent()
{
this.myComEvent();
}
}
}

Then the DLL file named MyComServer is registered using the following command

regasm MyComServer.dll /tlb:MyComServer.tlb

then after giving a Strong Name [sn -k MyComServer.snk]

the DLL file is registered into the global assembly using the command

gacutil -i MyComServer.dll

COMClient:

For the client application I used VC++ 6 MFC wizard[exe] and a simple dialog object.

I imported the MyComServer.tlb into stdafx.h file and all supporting header files.

Also done event sinking. After all those process i executed the MFC application. Then i encountered COM Error: 0x80040154 Class Not Registered.

Also is there any other option to invoke the events written in the class library?

Cathrin

Re: COM [modified]

User 21559722-Oct-07 1:04

22-Oct-07 1:04

Are you missing [ComVisible(true)] attribute for your COM coclass?

-- modified at 7:16 Monday 22nd October, 2007
What is your VC++ client code for creating the object?

Sohail

modified 21-Apr-21 21:01pm.

Catharin22-Oct-07 2:00

22-Oct-07 2:00

Yes, [ComVisible(true)] attribute in .NET Class Library (AssemblyInfo.cs).

User 21559722-Oct-07 2:36

How to get Close event of WORD? (COM)

22-Oct-07 2:36

Catharin wrote:
Yes, [ComVisible(true)] attribute in .NET Class Library (AssemblyInfo.cs)

So COMVisible(true) is present for the coclass you are instantiating from your VC++ client?

Can you tell me which part of your code fails with the HRESULT value you mentioned?

Sohail

modified 21-Apr-21 21:01pm.

PhanMinhDuy17-Oct-07 20:52

PhanMinhDuy

17-Oct-07 20:52

I am writing a plug-in which have a function call WORD and then get text from WORD. So, I must get Close event of WORD so that I could get the text from WORD. I created a CWordSinkEvent class to get the event. When WORD is closed, function OnWordClose() is called. But I was not allowed to call this function from my plug-in because this function is : afx_msg void OnWordClose(). I want my plug-in wait until it receive the Close event of WORD and get the text from WORD. Please help me with any solution as well. Thank you so much.

COM interfaces

DanyCode17-Oct-07 9:37

DanyCode

17-Oct-07 9:37

Hi!
I've this problem.I've to do a in process COM server in C++;the server has to send in real time as fast as possible a vector of six elements produced by a stand alone application (written in C++) to a MATLAB client. MATLAB client can't read the new value of vector untill the application does not write new one.
Can you suggest me a possible solution?

Thanks.

DanyCode

COM

Catharin16-Oct-07 0:09

16-Oct-07 0:09

How to call events written in C#.NET within VC++ 6.0?
please post a reply as soon as possible.

Re: COM [modified]

User 21559716-Oct-07 6:14

16-Oct-07 6:14

Catharin,

Clients don't call events. Events are raised from within the component and handles by the client. In your case C# .NET component will raise events.

If you are looking for how to call a method on .NET Component, see the link below
Exposing .NET Framework Components to COM[^]

See if the link below helps -
How to: Raise Events Handled by a COM Sink[^]

COM Interop: Really Raising Events Handled by a COM Sink - Check sample code[^]

Sohail

modified 21-Apr-21 21:01pm.

Catharin16-Oct-07 23:53