Question

DLL was loaded, but the DllUnregisterServer entry point was not found.

Asked by: inteq

Dear Experts,
I dowload winscard.dll(Version 5.1.2600.2180) from online to use inside my program. When I try to register it in both system32 and my project folder, I faced the following error.
"winscard.dLL was loaded, but the DllUnregisterServer entry point was not found."
I can't even unregister it .

Please help me to solve the problem..

Thanks banches in advance..

Regards.

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Asked On
2009-09-02 at 19:31:58ID24703424
Topic

Visual Basic Programming

Participating Experts
1
Points
500
Comments
12

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Answers

 

by: craisinPosted on 2009-09-03 at 07:00:53ID: 25250734

Have you tried it in "System" subdirectory rather than System32?

 

by: craisinPosted on 2009-09-03 at 07:21:56ID: 25250949

Forget what I just stated....I am investogating for you

 with TComRegistration.Create do
  begin
     try
       // Set lib name to the name of the dll you are working with
        if (Load(LibName) = ERROR_SUCCESS) and IsLoaded and 
          IsComLibrary
        then
 
          begin
           if (Perform(raUnregister) = S_OK) then
           begin
              ShowMessage('Unregistered');
           end;
          end;
     finally
        Free;
     end;
  end;
                                              
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by: craisinPosted on 2009-09-03 at 07:22:59ID: 25250958

The previoous code is in C so, I am trying to wriye a VB6 equivalent and incorporating Register/Unregister... will be back shortly

 

by: craisinPosted on 2009-09-03 at 07:33:12ID: 25251069

I just found an interesting tool on the Internet which may help you, and itd free.

Search for "Emsa Register Dll Tool"

I am not allowed to post the link here, but find it on the Internet using a "Google" search (or some other!) and give it a go. If it does not help I will work on some VB6 code for you.

 

by: inteqPosted on 2009-09-03 at 19:40:21ID: 25256558

Hello Craisin,

Thank you for your solutions. Sorry for my delay reply. I was busy with other projects yesterday. As you metioned, I just tried to register at system instead of system32.
It is failed also.. For another way, I downloaded Emsa tool. But when I went to their site and got the activation code, I couldn't find the icon to press for generating actiavation code. Are you sure that that Emsa tool is still free of charge? How could I do next?Waiting for you reply.

Thank you again & Regards.

 

by: inteqPosted on 2009-09-03 at 19:59:30ID: 25256591

Sorry Craisin,

I have got the acivation code and now trying..
Reply you asap..

 

by: inteqPosted on 2009-09-03 at 20:04:01ID: 25256599

Dear Craisin,

I tried to register & unregister winscard.dll by using EMSA Register Dll Tool.
I found the following error message.
"Selected file is not a valid ActiveX!".
Does it mean that I can't use winscard.ll (because of not valide ActiveX)?
Is there any way to register not a valid ActiveX into system32?

Thanks bances!

Regards.

 

by: craisinPosted on 2009-09-03 at 20:09:36ID: 25256618

No, it does not matter that it is not an ActiveX object.

I suspect that your DLL is corrupt.

Try to obtain a fresh version of it from somewhere and register again using EMSA.

Let me know how you go.

I will try to do the same at this end.

 

by: craisinPosted on 2009-09-03 at 21:03:09ID: 25256763

I have found the answer for you.

Winscard.dll is a windows native dll for handling smartcards. It is present in your system32 folder, but is NOT registerable via Windows regsrvr32.exe

Good advice would be to not try to use the winscard.dll directly in your vb application, instead creating a win32 dynamic dll which handles the functions of  winscard and use it in your project.

However if you don't want to go that way, just make sure the DLL is in your Windows\System32 subdirectory (so windows can find it) then use the code calls to the DLL directly as showing in the VB code found at the following link.

   http://www.activevb.de/rubriken/apikatalog/bylib/bylib144.html

You will have to register as a user of vbForums if you are not already a member (free)
It is a German dite, but I succeeded in registering then accessing the link I have just mentioned.

I think that will solve your problem.  :-)

 

by: craisinPosted on 2009-09-03 at 21:04:12ID: 25256768

Site...not "dite"!  ... sorry

 

by: inteqPosted on 2009-09-03 at 22:37:38ID: 25257031

Dear Craisin,
Thank you for the useful link.

I already stored inside system32.(It should be worked if it is not registerable. right?)
It is strange!
I don't know why it is not working. I will find out more details again.

Thank you.

 

by: inteqPosted on 2009-09-03 at 22:53:40ID: 25257074

Dear Craisin,

Thanks a lot..
I just fixed my problem.
Yes you are right. Winscard.dll doesn't need to register to use.

Actually I am really a careless person..

My code statement is shown as below :
RetCode = SCardListReaders(hContext, sReaderGroup, sReaderList, ReaderCount)

After finsh SCardListReaders, the function should response the connected reader list..

I didn't declare the following variables inside my program and I didn't get the reader list.
'-------------------------------------
Dim sReaderList As String * 256
Dim sReaderGroup As String
Dim ReaderCount As Long
'------------------------------------

Now I have got the connected readers after I decleared them . :P


Thank you very much.


20120131-EE-VQP-002

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