[gameprogrammer] Re: Create dll files ?

There are issues you need to be aware of with creating a .dll though.
If the .dll is intended to run as a process (ie. It contains a DllMain), it 
might not be allowed to run without the proper security settings. Even then, 
with using it on XP, and possibly Win2k, every time the process is created 
for the .dll, the OS has to perform a security check to see if the .dll is 
allowed to run. This can be a huge pain in the ass, because calling the .dll 
multiple times a minute will seriously kill performance.

Now, if you just want to use the .dll as a class/function library and omit 
the DllMain function, then you wouldn't have those security checks. And so, 
you wouldn't run into the slowdown.

As for an idea of how to make a .dll with .NET, you could use the ATL method 
that was mentioned, or you could also do the following:

1. Create a new Win32 project.
2. When the final dialog appears, click on "Application Settings" and choose 
DLL as the project type.
3. In the "Additional Options" area, if you want to code the DLL from 
scratch (ie. use it as a class/function library), select "Empty Project", 
which will start the project with no files. Now, if you want to create the 
DLL as a process, leave Empty Project unchecked.
4. "Export Symbols" will create a simple class, a simple function, and a 
variable, and set them up so they can be exported to your other application. 
This method isn't so bad when you don't know how to set up a DLL.

Personally, I only use DLLs as a process when I'm working on a tool. Any 
other time, the DLL serves as a class library.

If you need more information, http://www.flipcode.com/ has a tutorial on 
creating and using DLLs.
http://www.flipcode.com/tutorials/tut_dll01.shtml

It's not too bad. And should be able to give you some ideas.

Hope that made some sense,
Kevin


From: "Tri M. Dang" <tridangus@xxxxxxxxx>
Reply-To: gameprogrammer@xxxxxxxxxxxxx
To: gameprogrammer@xxxxxxxxxxxxx
Subject: [gameprogrammer] Re: Create dll files ?
Date: Sun, 12 Sep 2004 21:42:47 -0700 (PDT)

in C++.net, lib files or any other project type have the output wrapped in 
dll.  If you create a Visual managed C++ class library project and combine 
it, what you will have as output is a standalone, version controlled .dll 
file that you can reference to from any other project.

To create dll file in VS.net/VC++:
        select ATL project for window control lib
                  or managed C++ class library project for shared library 
classes.
        Then combine the project and you will have a .dll as output.


tran nhat khanh <nhatkhanh1984@xxxxxxxxx> wrote:
I've read several books but I can't find how to create
dll files using C++.net. Can you show me how to do
that ? Does anyone know the diffirent between dll and
lib file ?



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