How to call a DLL written by C# from VB codes?

I wrote a class library (compiled as DLL) using C#, with source codes as the follows:

==============================================================
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Threading;
using System.Diagnostics;
using System.IO;
using System.Text;

namespace UTS_Convertor
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class Class1
{
  public Class1()
  {
   //
   // TODO: Add constructor logic here
   //
  }
  public byte [] uts_convert( byte [] unicode_bytearray )
  {
   UnicodeEncoding Unicode = new UnicodeEncoding();
   UTF8Encoding UTF8 = new UTF8Encoding();

   String unicode_str = Unicode.GetString( unicode_bytearray );
   byte [] utf8_bytearray = UTF8.GetBytes( unicode_str );
   return( utf8_bytearray );
  }
}
}
==============================================================

Can the DLL be called by a VB application If can, how to write the VB codes If can not, how to compose the DLL under Visual C#

Big Smile

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How to call a DLL written by C# from VB codes?

cstackable
I'm a little confused.

Do you want this code in C# dll that can be referenced by a VB application

or

Do you want this code to be converted to and written in VB
W Hooper
Hello,

I am trying to do something similar and I am in a desperate need of help.

I am trying to use C/C++ dlls in VBA. Those dlls are a third-party dlls and I have no control on them. I just want to be able to use them.
as an example of what I am trying to do is:

I need to use the function : getDirectory() which is a member of DFCLib.IDfFile

At the top (outside my sub) I declared the function :
Declare Function getDirectory Lib "C:\Program Files\Documentum\Shared\DcNewComp.dll" () As String

but at :

Set fx = New DFCLib.myIDfFile

I get the error : User-defined type not defined.
from the object browser I can see that IDfFile (IDfFile seems to be a class) is a member of DFCLib.

Thanks in advance.
Christian Jensen
Thanks Johan.

And to note: I like Sub New, it's completely self explanitory.

Randy
Waitcursor

Randy's suggestion should work - but you may have to use the namespace qualified name when you create the object:

Public MyClass as New UTS_Convert.Class1

Randy: what I suspect you find weird about the C# code is the constructor syntax in C#. In C# (and C++) you use the name of the class where you would use Sub New in Visual Basic.

Best regards,
Johan Stenberg
grikgal
Moonriver,

Please do not post multiple threads of the same post. I have removed the other duplicates.
Scott S. Waschitz
David M. Kean wrote:
I'm a little confused.

Do you want this code in C# dll that can be referenced by a VB application

or

Do you want this code to be converted to and written in VB

He wants to know if the code written in C# and made into a DLL can be used in a VB application. Then he wants to know how to do that. And if it cannot, then explain how to change the C# code so that VB can access it.

My answer in part would be.

If Yes to using in VB as is Then here's how to call. First make a referance to the DLL compiled file. In VB create an object from the class

Public MyClass as New Class1

Then within a method or event use the code as follows.

Dim MyByteArr as Byte()

MyByteArr()=MyClass.uts_convert (MyByteArr())

But I can't say with certainty that it will work. The best way to find out is to try it. The code doesn't look right to me, but since I don't program in C# what do I know For those who do is it standard to define a class and then immediately referance it again as public Looks weird to me. Is that the equivelent of the Main() as in C++

Randy
How to call a DLL written by C# from VB codes?

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