Re: COM objects all unregistered - COM Discussion Boards

Re: how to use tlbinf32.dll

26-Jan-07 6:12

Please mention error details!

S o h a i l K a d i w a l a

To Err Is Human; to Debug, Divine

modified 21-Apr-21 21:01pm.

huangdingjun30-Jan-07 16:17

huangdingjun

30-Jan-07 16:17

the errors are like follows:

e:\arcgis\test1\debug\tlbinf32.tlh(179) : error C2059: syntax error : '('
e:\arcgis\test1\debug\tlbinf32.tlh(183) : error C2143: syntax error : missing ';' before '}'
e:\arcgis\test1\debug\tlbinf32.tlh(187) : error C2371: 'TKIND_ENUM' : redefinition; different basic types
c:\program files\microsoft visual studio\vc98\include\oaidl.h(540) : see declaration of 'TKIND_ENUM'
e:\arcgis\test1\debug\tlbinf32.tlh(188) : error C2371: 'TKIND_RECORD' : redefinition; different basic types
c:\program files\microsoft visual studio\vc98\include\oaidl.h(541) : see declaration of 'TKIND_RECORD'
e:\arcgis\test1\debug\tlbinf32.tlh(189) : error C2371: 'TKIND_MODULE' : redefinition; different basic types
c:\program files\microsoft visual studio\vc98\include\oaidl.h(542) : see declaration of 'TKIND_MODULE'
and more ...

COM objects all unregistered

Marcus J. Smith24-Jan-07 0:29

Marcus J. Smith

24-Jan-07 0:29

How is it possible for an entire machine's COM pointers to simultaneously unregister themselves?

Cleako

Roger Stoltz24-Jan-07 1:14

Roger Stoltz

24-Jan-07 1:14

cleako wrote:
COM pointers

What do you mean by that?

cleako wrote:
simultaneously unregister themselves

How did you come to that conclusion?

Try describing the problem instead of making an assumption about the cause.
What happens? Can you create objects or not? Error messages?

"It's supposed to be hard, otherwise anybody could do it!" - selfquote

User 21559724-Jan-07 5:37

24-Jan-07 5:37

Or is he trying to find a way to unregister everything on the system and have fun Smile | :)

S o h a i l K a d i w a l a

To Err Is Human; to Debug, Divine

modified 21-Apr-21 21:01pm.

Marcus J. Smith27-Jan-07 2:54

Marcus J. Smith

27-Jan-07 2:54

We have an app server and a web server. The web server contains all of the COM objects as well as the app server but the web server is supposed to point to the app server and run those COM objects instead of on the itself. Everthing was working and suddenly many COM objects simply could not be located and when the program runs the error message is something along the lines of "Could not create object" and I am guessing the cannot find object error code.

The COM objects have been re-registered but I am curious how they just unregistered themselves, assuming nobody did it and just isnt speaking.

Cleako

Sending command through serial port - error Overlapped I/O operation in process

prasad_som25-Jan-07 17:05

prasad_som

25-Jan-07 17:05

Reword your question to other's understanding.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Matt_deveau23-Jan-07 11:30

Matt_deveau

23-Jan-07 11:30

Hi all,

Working on sending commands to a device, I have been using the code provided by Ashish Dhar, here : www.codeproject.com/system/serial_com.asp
(I know I should post there, but there are many post without any reply there, so...)

Everything was going fine using this simple code:

char receive_write[] = {0x02, 0x00, 0x02, 0x00, 0x30, 0x01, 0x31, 0x18};
m_theCommPort.Write(receive_write, sizeof(receive_write) );

Now, I need to send a longer string of unsigned char :

unsigned char receive_write[] = {0x02, 0x00, 0x07, 0x00, 0x75, 0x01, 0x00, 0x01, 0x00, 0x91, 0x01, 0x7D, 0xB6};
m_theCommPort.Write(receive_write, sizeof(receive_write) );

Now the device returns a "unknown command" telegram. But the command is the right one.

Write uses WriteFile,
WriteFile returns FALSE and GetLastError returns error 997 : Overlapped I/O operation in process

Is it related to timeout, or to the string length, or either?

Thanks for helping,

Matthieu Deveau

Re: Sending command through serial port - error Overlapped I/O operation in process

Tim Paaschen23-Jan-07 19:21

Tim Paaschen

23-Jan-07 19:21

Hi,

The 'error' ERROR_IO_PENDING (=997) just tells you that the method WriteFile has returned before all the data have been transmitted. This is usually the reason why someone uses overlapped operations - you don't want to block your application waiting for the IO operation to finish.
I recommend that you do some reading on overlapped operations. You should find a lot material on this site.

Regards,
Tim

Retrieve Com-Object which implements interface

rncwnd22-Jan-07 5:57

rncwnd

22-Jan-07 5:57

Hi,

I have a .tlb-file which only contains Interfaces for a COM-Application.
How can I use this Interfaces in C#?
How can I "instantiate" these Interfaces to use the functions they provide?

Thanks in advance,
Andy

.Net Com

Ron.S22-Jan-07 0:20

Ron.S

22-Jan-07 0:20

Hello all,
I am using visual basic6 for creating the DLLS. Can anyone help me how can i move on to VB.Net or C#.NET COM. I am new to .Net technology.

Thanks in Advance..

bharath.s

how to add mat files from matlab to the com builder of matlab

ranjeet_randy19-Jan-07 22:23

ranjeet_randy

19-Jan-07 22:23

hello,
in my prj i ve mat files that i want to add to the com builder of matlab which have version MATLAB COM BUILDER 1.0.
com builder add only *.m files and mex files(*.dll) pls suggest how to add mat file to com builder

Interop question VB.NET 2.0

Marcus J. Smith19-Jan-07 2:41

Marcus J. Smith

19-Jan-07 2:41

I have referenced a VB6 DLL and I have access to it and all is well. The problem is that I have had to make changes to that DLL and other applications point to it.

The question is this, does the application need that original DLL in the original location or just simply registered on the server, and just trying this it looks like it needs to be in that original location??

Cleako

COM libraries and .NET

jesarg18-Jan-07 12:56

jesarg

18-Jan-07 12:56

I'm on a .NET project, and I need to be able to (with .NET code):
1. Open a library that contains COM objects.
2. Find the class GUID, interface GUID, and description of each and every COM object in the library. In other words, it's sort of like using reflection on a COM library using .NET code.

Any help is greatly appreciated.

Re: COM libraries and .NET

lafleon19-Jan-07 13:09

lafleon

19-Jan-07 13:09

Hello,

Just check "Using Native COM Servers from .NET" article on MSDN.

Regards,
LF

Newbie - Memory sharing in COM

jayart17-Jan-07 5:42

jayart

17-Jan-07 5:42

Hi,
I have a doubt regarding memory sharing in a COM object.
Background: Recently we shifted to VS2005. Hence the dll written in VC6 is no longer directly useful. I might have to write a COM wrapper to access this dll. The application would be working with huge files and I want only a single copy maintained across my application. The dll should actually read the file and after the error checking send the a pointer of the memory to my application.
My question:
1) Is it possible to do it with COM?
2) What would happen if my COM object memory is on a remote server?
3) Does the COM object copy the memory and send it to the requested application or does it just pass the reference.
My intention is to maintain a single place of memory where the file data would be read and used.
Please let me know how can I achieve this through COM. Any links would be useful.

Regards,
Arti Gujare

User 21559717-Jan-07 6:40

17-Jan-07 6:40

ArtiGujare wrote:
Recently we shifted to VS2005.

I believe you meant "it's managed code now"

ArtiGujare wrote:
Recently we shifted to VS2005. Hence the dll written in VC6 is no longer directly useful. I might have to write a COM wrapper to access this dll

Do you really need COm wrapper or P/Invoke helps ?
http://www.google.co.in/search?hl=en&q=P%2FInvoke&btnG=Search&meta=[^]

S o h a i l K a d i w a l a

To Err Is Human; to Debug, Divine

modified 21-Apr-21 21:01pm.

jayart17-Jan-07 7:05

jayart

17-Jan-07 7:05

Thankyou Sohail.
I am a newbie to COM.

When I said we shifted to VS2005 I meant that the application using the dll was previosly written in VC6 and dll too was written in VC6. Now the application has to be written in VS2005 and still use the VC6 dll. My typical use case is:
1) Application send the file name to the dll.
2) dll reads the file at that mentioned filepath and does some file checks
3) if the file is in expected format, the dll returns the pointer pointing to the file data to the applictaion.
Can I achieve this using P/Invoke?

Regards,
Arti Gujare

User 21559717-Jan-07 12:33

17-Jan-07 12:33

P/Invoke is a way of invoking unmanaged code from within .NET (a rough description, for more and precise detials see MSDN Smile | :)

)
If the code you have ported to VS 2005 is still unmanaged code then I don't see any reason why it's not working with your old VC6 DLL.
If your application when written in VS2005, is ported and made to be .NET complaint then please read on topics related to 'how to call unmanaged code/dll from within managed code' this will lead you to P/Invoke somewhere
http://en.wikipedia.org/wiki/P/invoke[^]
http://msdn.microsoft.com/msdnmag/issues/03/07/NET/[^]
http://msdn2.microsoft.com/en-us/library/aa446536.aspx[^]

Please read about P/Invoke basic and you will be able to decide based on your project needs what to use - P/Invoke or a COM wrapper

I hope this helps.

S o h a i l K a d i w a l a

To Err Is Human; to Debug, Divine

modified 21-Apr-21 21:01pm.

Tim Paaschen17-Jan-07 20:15

Tim Paaschen

17-Jan-07 20:15

VS2005 provides several programming languages. I assume that you continue to use C++. In this case you can just use your unmanaged DLL (written in VC6) as you have done before. It's your choice to make the application managed or unmanaged. If you make the application managed (C++/CLI), you may have to take special care when you are marshalling data (e.g. pointers or strings) from your unmanaged code to the managed one.

P/Invoke will only be required, if you you change the programming language for your application to a pure managed language, e.g. C#. If you are doing this, I recommend to have a look at http://pinvoke.net/.

Regards,
Tim