[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

dll and lib files

Posted on 2002-04-22
3
Medium Priority
?
322 Views
Last Modified: 2010-04-02
I'm currently playing with creating dll's in visual c++.
Everything's working great. I just a a small question.
When you compile the project, two files are created:
lib and dll. Am I correct in assuming that the dll is the
actual executable code, and that the lib file is like a
kind of descriptive file that explains to the program whats in the dll?

-Chris
0
Comment
Question by:CPOsosky
  • 2
3 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 200 total points
ID: 6960750
You are absolutely right - the lib file (also called "import lib") only satisfies the linkers need to resolve all symbol names; it merely is an "import table" that points to the DLL itself.
0
 
LVL 86

Expert Comment

by:jkr
ID: 6960758
BTW: Here's the description from the VC++ glossary:

"import library
A .LIB file that contains information about one or more dynamic-link libraries (DLLs), but does not contain the DLL's executable code. The linker uses an import library when building an executable module of a process, to provide the information needed to resolve the external references to DLL functions. "
0
 
LVL 49

Expert Comment

by:DanRollins
ID: 6961179
>>and that the lib file is like a kind of descriptive file that explains to the program whats in the dll?

You might have a misconception.  The LIB file is used only by the LINKER.  Later, when a program accesses the DLL, the LIB file is not needed.  So it doesn't 'explain to the program...', rather, it 'explains to the LINKER...'.

-- Dan
0

Featured Post

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.

Question has a verified solution.

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

Often, when implementing a feature, you won't know how certain events should be handled at the point where they occur and you'd rather defer to the user of your function or class. For example, a XML parser will extract a tag from the source code, wh…
  Included as part of the C++ Standard Template Library (STL) is a collection of generic containers. Each of these containers serves a different purpose and has different pros and cons. It is often difficult to decide which container to use and …
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

872 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