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04/15/2004 at 03:37PM PDT, ID: 20955837
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6.0

(continued)working with dll's in C#

Asked by fsalcedo in C# Programming Language

Tags: dll_export, absolute, assemblies

This is an extension to a previous question.
I was previously using an MFC extension DLL created using C++ version 6.0, now it has been upgraded to the .NET 7.0 C++ version, but either way I am getting the same error with either version. I am using C# in the .NET platform and have a declaration such as
[DllImport("my.dll")]
     public static extern int Test(int x);

and when I call the function Test, I receive the error: Unable to find an entry point named Test in DLL my.dll.  Test simply computes the square of a given number.  I have already read many MSDN library help but none has helped so far.  I am not sure if I have to register my DLL somehow, right now I am either placing it in the same directory as my program or, if not in same directory, specified the absolute path such as ("h://my.dll").  I also declared "using System.Runtime.InteropServices;".  One more thing, I tried adding a reference to the DLL by going through Projects->Settings->  but I receive the message :This is not a valid assembly or COM component. Only assemblies with extension '.dll' and COM components can be referenced....

Thanks for your time
[+][-]04/15/04 04:03 PM, ID: 10837878

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[+][-]04/15/04 04:09 PM, ID: 10837908

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[+][-]04/15/04 04:13 PM, ID: 10837929

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[+][-]04/16/04 10:06 AM, ID: 10844210

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About this solution

Zone: C# Programming Language
Tags: dll_export, absolute, assemblies
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Solution Provided By: Troy_Lyne
Participating Experts: 3
Solution Grade: C
 
 
[+][-]04/16/04 10:36 AM, ID: 10844475

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