Why we make a dll file

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Dear Friends.

I am working in VB.Net 2008 from two years. I have a serious confusion. I want to know that why we write classes and functions etc in a separate DLL file and then use it in our EXE, while we can write these classes and functions also in our EXE file.
Can some one Plz give me a brief answer of my question.

Waiting for Answer.

Posted 21-Sep-10 4:09am

rashidfarooq

Updated 21-Sep-10 4:23am

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T2102 · Answer 1 · 2010-09-21T04:12:00

Solution 1

Reuse. You can use dll's in executables, Matlab, Excel, Statistical packages, ....

Posted 21-Sep-10 4:12am

T2102

Comments

rashidfarooq 21-Sep-10 10:24am

Brother You could not understand my question. I want to know that the code that we can write direct in Exe, why we write that code in a separate dll file and then call it from Exe.

Marc A. Brown 21-Sep-10 10:36am

He *did* answer your question. You put things in a DLL in order to reuse them in another project. Now if you're asking why *you're* putting stuff that you can't/won't reuse elsewhere into a DLL, you're asking us to read your mind.

Baji Jabbar 22-Sep-10 4:52am

@rashidfarooq Reusing is not coping and pasting code. I was also having the question for a long time. "Why should we have to make a class as a dll for reusing , we have the code and we can copy and paste" .This was in my mind and hope this is in yours. And you already got the answer from others. For reusing :)

Kschuler · Answer 2 · 2010-09-21T05:58:00

You put stuff in a dll that you might want to reuse in several other places so that you don't have to put that code in several different exe. Then if that code needs to be changed for any reason you only have to change it once and then refresh the dll. For example, my company has a dll that contains a bunch of calculators. We have a couple different websites and a PC program that all use the same calculations. So instead of putting that code in each website and in the PC program's exe we have it in a dll and each website and the pc program refer to it.

Abhinav S · Answer 3 · 2010-09-21T06:29:00

Solution 3

Check this out.

Posted 21-Sep-10 6:29am

Abhinav S