Solved

Need help with CRegKey!

Posted on 1998-09-20
10
313 Views
Last Modified: 2013-11-19
hello there. i wanna use CRegKey provided in VC++ 5 to access Win95's registry, but while i compile my app i get an error: LNK2001: unresolved external symbol "public: long __thiscall ATL::CRegKey::Open(void)" (?Open@CRegKey@ATL@@QAEJXZ)

i already include "atlbase.h", but it seems VC can't find the implementation defined in "atlimpl.cpp". do i have to put this file into my project? or there's another solution?
please help...
0
Comment
Question by:darrelliu
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 4
10 Comments
 
LVL 6

Expert Comment

by:thresher_shark
ID: 1322350
Are you including the right library (LIB file) too?
0
 

Author Comment

by:darrelliu
ID: 1322351
which one? ATL.LIB? i tried this but not working...
0
 
LVL 6

Expert Comment

by:thresher_shark
ID: 1322352
Wow this is really pathetic, there is no place in the documentation that tells you what library file to use.  But, from what meager information is in that header file, it would seem that atl.lib is the correct one.  I am not sure why it is not working.
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
LVL 6

Expert Comment

by:thresher_shark
ID: 1322353
We can do this the hard way though... Copy the file atlimpl.cpp (located in the vc\atl\include directory) to the directory your project is in, and then include it.  That ought to fix it.
0
 
LVL 6

Accepted Solution

by:
thresher_shark earned 100 total points
ID: 1322354
In fact, I am certain that will fix it.  Please take my above comment as an answer.

If you have any further questions, please feel free to ask.

Thanks!
0
 
LVL 6

Expert Comment

by:thresher_shark
ID: 1322355
Clarification:

I said:
>> and then include it.  That ought to fix it.

I meant to say:
>> and then add it to your project by going to the Project menu->Add to project->Files.  That ought to fix it.
0
 

Author Comment

by:darrelliu
ID: 1322356
yes, i even have tried to this. i copied 'atlimpl.cpp' into the 'myapp' directory and added it into my project, but when i compiled it, i got an error said:
error LNK2001: unresolved external symbol "public: long __thiscall ATL::CRegKey::Open(struct HKEY__ *,char const *,unsigned long)" (?Open@CRegKey@ATL@@QAEJPAUHKEY__@@PBDK@Z)
well there's only one, not like before there were 2, 'Open' and 'Close'. i think it's because there's no parameters needed for 'Close'. i don't know why, but compare with the definition, seems because a 'overloaded' 'Open' function can not be found (the original definition should be LONG Open(HKEY, LPCTSTR, REGSAM))...
anyway, thank your help!
0
 
LVL 6

Expert Comment

by:thresher_shark
ID: 1322357
Glad I could help.
0
 

Author Comment

by:darrelliu
ID: 1322358
wow! finally i got it! i modified 'atlbase.h' and 'atlimpl.cpp' and left only those CRegKey parts, then added to my project and it worked! i mean it now can go thru the compiling. so this class just has nothing to do with the ATL. thanx for the help!
0
 

Author Comment

by:darrelliu
ID: 1322359
and, don't forget to include "stdafx.h" in your modified 'atlimpl.cpp' or you'll get hundreds of errors!
0

Featured Post

Enroll in July's Course of the Month

July's Course of the Month is now available! Enroll to learn HTML5 and prepare for certification. It's free for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Displaying information on the statusbar.   Continuing from the third article about sudoku.   Open the project in visual studio. Status bar – let’s display the timestamp there.  We need to get the timestamp from the document s…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
There's a multitude of different network monitoring solutions out there, and you're probably wondering what makes NetCrunch so special. It's completely agentless, but does let you create an agent, if you desire. It offers powerful scalability …

630 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question