RE: Dll's Basic Question

Hi,
How do you know what kind of dll it is?

Thanks.

Jim

James D Homme, Usability Engineering, Highmark Inc.,
james.homme@xxxxxxxxxxxx, 412-544-1810

"The difference between those who get what they wish for and those who
don't is action. Therefore, every action you take is a complete
success,regardless of the results." -- Jerrold Mundis
Highmark internal only: For usability and accessibility:
http://highwire.highmark.com/sites/iwov/hwt093/


                                                                           
             "Jamal Mazrui"                                                
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                                       RE: Dll's Basic Question            
                                                                           
             08/28/2008 07:40                                              
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Also, a DLL can be a COM server rather than a Win32 API type of DLL.  In
that case, a COM browser will list its name (if it is registered), and
you can browse its objects, properties, methods, and events.  Finally, a
DLL can be a .NET assembly, and certain .NET utilities can let you
similarly browse the objects it defines.

Jamal
On Wed, 27 Aug 2008, Ken Perry
wrote:

> Date: Wed, 27 Aug 2008 23:20:20 -0700
> From: Ken Perry <whistler@xxxxxxxxxxxxx>
> Reply-To: programmingblind@xxxxxxxxxxxxx
> To: programmingblind@xxxxxxxxxxxxx
> Subject: RE: Dll's Basic Question
>
>
> Jim asked,
> "Hi,
> If you see a dll on your system, how do you discover what it is capable
of
> doing?"
>
> You can list function names for a specific DLL, such as user32.dll, by
> running a variety of command-line tools. For example, you can use dumpbin
> /exports user32.dll or link /dump /exports user32.dll to obtain function
> names.
> Jim asked,
> " Here's a related question. If you are using VisualBasic or some
> environment and you tell the environment to include a library.
>  are you connecting your project to a dll?"
> In most cases yes your using a dll but it depends if the library is a dll
or
> a static link library as you will find in a lot of c and c++ projects.
If
> your using Visual basic most of the time it's a dll that your linking
unless
> you do some magic to make sure your not.
>
>
> Jim ask,
> "Related to that, if you are using PHP, and you uncomment one of the
> extension lines in php.ini, assuming that doing that makes it connect to
a
> dll, what actually is happening behind the scenes? If you answer, can you
> please phrase the answer in plain language?"
>
> Well first off I have not studied the plane language and I could not find
a
> compiler for it so I will have to try my best to fake it.  Assuming that
it
> does include a dll what it does is link that dll in to the binary and
allow
> the scripts access to the exported functions.  I guess the plane language
> description of what is going on is if you had a building of rooms with
files
> in all the rooms and a central group of file clerks.  Lets say there are
100
> rooms of file cabinets.  When php starts up it has access to the default
25
> rooms and that is all your file clerks have keys to.  So when you tell
them
> to search for a file they run through all the 25 rooms and if they don't
> find the file your looking for they come back pretty quick and tell you.
> Then when you uncomment that dll in the init file you give those clerks a
> key to another room.  Now they can run through that room and check for
your
> file.  If the file your looking for is in the new room you can now access
> it.  Note we didn't build another room that room is there already.  In
> contrast if you linked a static library in you would have to hire a
> contractor to knock out a wall and connect a new room to the building.
The
> nice part is though you can have them build it really close to the clerks
> office and thus make it faster to search than a dll not much faster but
it
> can be faster but it would definitely take up more space.
>
> That description really does not explain it because every program can
access
> the dll just as fast as each other where as in my description of a
building
> you would have to use different universal dimensions to pull off how
> different programs access the same dll.
>
> Now if I have not confused you to much I think I answered your questions.
>
> Ken
>
>
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