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Connecting to DLL

Posted on 2002-06-26
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Last Modified: 2010-04-15
Hello,

Its a beginner question :

1) How easy is it to connect with C# to DLL ? is there some easy mechanism ?
2) The same question -> about   building ActiveX / OCX

Does the implementation is more like VB or VC ?

thank u
Asi
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Question by:asi
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by:xloop
ID: 7110254
It's very simple, you add your reference to the DLL/OCX via

Then add your DLL in the same directory as your application file.

No more entering dll's into the registry.

Simple as that!

Good luck
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by:xloop
ID: 7110255
It's very simple, you add your reference to the DLL/OCX via Project menu > Add Reference

Then add your DLL in the same directory as your application file.

No more entering dll's into the registry.

Simple as that!

So it's not really like VB or VC

Good luck
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by:flytiger
ID: 7112500
use C# command line complier

csc /target:exe /r:anything.dll  yourcode.cs

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jrspano earned 50 total points
ID: 7122058
1) How easy is it to connect with C# to DLL ? is there some easy mechanism ?
Depends on the kind of dll you want to connect to.  If it is a standard win32 dll you use the DllImport function in System.Runtime.InteropServices.  If it is an active x dll you set a reference to the dll just like in vb6 and then use it.  On the target machine you must make sure the activex dll is installed and registered just like you would have had to do before using it in vb6


2) The same question -> about   building ActiveX / OCX
It is very easy to build dll's and ocx's in c# to use in other .net languages.  Just set a reference to the dll/ocx project and you are done.  If you want to make an activex dll or ocx to use in another language like vb6, it is harder.  You have to wrap the dll/ocx and give it a strong name(guid).  then it can be installed and registered like other activex controls and used in vb6.
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