Unmanaged DLLImport from C++ to C#

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hi

I am trying to import a C++ dll(writen by some hardware manufacturer) into another C# dll that I am designing.

As i am new to this Dll imports and Visual studio (c#, c++) I am having a hard time to do that.

I tried to add as reference, I placed the dll in to physical location(bin), I tried to Register the dll with cmd line, all these failed
Later I tried to use reflections by creating Delagates for the methods.

it did not work,

so now tried to do the MArshalAs for the variables (Handler) that are in the c++ dll functions.

Can some body please provuid source code for how to Import a c++ dll into another c# dll.

I have looked at general examples....but still no luck....

Thanks in advance...

Posted 4-May-11 14:17pm

rsdreddim

Updated 4-May-11 16:17pm

Sergey Alexandrovich Kryukov

v2

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Sergey Alexandrovich Kryukov 4-May-11 20:50pm

This is too general question. To answer it, don't search for the sample close to yours, you may never find it. Just read all on the topic, or show the code you want to P/Invoke.
--SA

Sergey Alexandrovich Kryukov 4-May-11 21:01pm

Please see my answer,
--SA

3 solutions

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Wonde Tadesse · Answer 1 · 2011-05-04T14:43:00

Solution 1

Please look how to use unmanaged codes in .NET environment.Unmanaged codes[^] .

Posted 4-May-11 14:43pm

Wonde Tadesse

Comments

Sergey Alexandrovich Kryukov 4-May-11 20:48pm

Sorry, Wonde; there is not a sample with MarshalAs here. OP needs some closer sample or overview showing all techniques or just say "Search harder".
--SA

Sergey Alexandrovich Kryukov · Answer 2 · 2011-05-04T14:58:00

As I say, this is too general question; so nobody can provide a "sample". A sample for what, exactly?

Try to learn it all:
http://en.wikipedia.org/wiki/PInvoke[^],

Start from here:
http://msdn.microsoft.com/en-us/library/sd10k43k.aspx[^],
http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.dllimportattribute.aspx[^]
http://msdn.microsoft.com/en-us/library/system.runtime.interopservices.marshalasattribute(v=VS.100).aspx[^].

After all, provide a signature of the function you want to P/Invoke and what you try to do, just few lines of code. Use "Improve question".

—SA

Kim Togo · Answer 3 · 2011-05-04T20:25:00

Solution 3

A good inspiration could be pinvoke.net[^]

Posted 4-May-11 20:25pm

Kim Togo