Calling a VB DLL Methods external to .NET

[Dominic via DotNetMonster.com]

I am a CA-OpenROAD programmer, but I attempting to build some VB.NET DLLs
and access them through OpenROAD as an external Windows TypeLib.

I have managed to build a simple DLL (code follows) but the only method
that I can see exposed is "DisplayNum ber" which is a sub declared in a
public interface definition rather than "DisplayNumbers " which is the name
of the public sub based on the interface definition.

My problem is when I attempt to call the "displaynum ber" method I get an
error saying that this method does not exist for the class "myinterfac e".

What I would like to know is this a common problem for calling methods in a
VB.NET DLL external to .NET apps? Ultimately I want to call the
"displaynumbers " method.

FYI after I built the DLL I the performed the following commands in the bin
dir of the project (ClassLibrary4) :

regasm.exe /tlb:ClassLibrar y4.tlb ClassLibrary4.d ll
gacutil.exe /i ClassLibrary4.d ll
And here is the code:

--------------------------------------------------------------

Public Interface MyInterface
Sub DisplayNumber()

End Interface

Public Class Class1
Implements MyInterface
Public Sub DisplayNumbers( ) Implements MyInterface.Dis playNumber

' This method does nothing. I am hoping to just see it.
MsgBox("This is from a VB.NET DLL")

End Sub

End Class

-----------------------------------------------------------------------

Any help would be much appreciated.
Dominic

[M. Posseth]

well here is a copy paste example of what you need

<ComClass(ComCl sMP.ClassId, ComClsMP.Interf aceId, ComClsMP.Events Id)> _

Public Class ComClsMP

#Region "COM GUIDs"

' These GUIDs provide the COM identity for this class

' and its COM interfaces. If you change them, existing

' clients will no longer be able to access the class.

' make sure that the below values are unique for every new project

Public Const ClassId As String = "7BAC16DC-0103-4BA3-9A89-53253372D711"

Public Const InterfaceId As String = "3CE4FCAF-CEEA-4849-9743-0E8E38D313AE"

Public Const EventsId As String = "7E90CE2E-8A8C-45A2-870A-3461A9DF28B7"

#End Region

Public Sub Helloworld()

MsgBox("This is a helloworld EXAMPLE from a VB.NET DLL exposed to COM")

End Sub

' A creatable COM class must have a Public Sub New()

' with no parameters, otherwise, the class will not be

' registered in the COM registry and cannot be created

' via CreateObject.

Public Sub New()

MyBase.New()

End Sub

End Class

If you want to use this assembly on a pc on wich it wasn`t compiled then
register it with RegAsm.exe or use a installer ( the standard installer
in VS.Net is fine for this task )

late binded VB6 example how to call the dll ( no reference or anything is
necessary in this case )

Dim Objenc As Object
Set Objenc = CreateObject("a ssemblyname.cla ssname")

Objenc.Hellowor ld
Well i hope to have given you some ideas :-)

Happy coding

M. Posseth [MCP Developer]
"Dominic via DotNetMonster.c om" <fo***@nospam.D otNetMonster.co m> wrote in
message news:ee******** *************** *******@DotNetM onster.com...

I am a CA-OpenROAD programmer, but I attempting to build some VB.NET DLLs
and access them through OpenROAD as an external Windows TypeLib.

I have managed to build a simple DLL (code follows) but the only method
that I can see exposed is "DisplayNum ber" which is a sub declared in a
public interface definition rather than "DisplayNumbers " which is the name
of the public sub based on the interface definition.

My problem is when I attempt to call the "displaynum ber" method I get an
error saying that this method does not exist for the class "myinterfac e".

What I would like to know is this a common problem for calling methods in a VB.NET DLL external to .NET apps? Ultimately I want to call the
"displaynumbers " method.

FYI after I built the DLL I the performed the following commands in the bin dir of the project (ClassLibrary4) :

regasm.exe /tlb:ClassLibrar y4.tlb ClassLibrary4.d ll
gacutil.exe /i ClassLibrary4.d ll
And here is the code:

--------------------------------------------------------------

Public Interface MyInterface
Sub DisplayNumber()

End Interface

Public Class Class1
Implements MyInterface
Public Sub DisplayNumbers( ) Implements MyInterface.Dis playNumber

' This method does nothing. I am hoping to just see it.
MsgBox("This is from a VB.NET DLL")

End Sub

End Class

-----------------------------------------------------------------------

Any help would be much appreciated.
Dominic