Exporting functions in VB.NET

[Azrael-TFX-]

I'm trying to create a DLL in vb.net, only when I try to call the function in the dll, it says the entry point is not found. Obviously this is because I haven't exported the function I'm trying to call - I had the same problem when I started messing with dlls vc.

Anyway, how do you export a function from in vb .net?

Thanks

[Cander]

how are you declaring and calling this function?

[Azrael-TFX-]

using a declare statement:

Declare Sub test Lib "d:\test.dll" (msg As String)

and then

test (text1.text)

[Cander]

cant do that . .NET dll's are not like API callable dll's. you have to first add a Reference by right clicking the project in the solution explorer and choose Add Reference. Find and check off the appropriate control. Then declare it,

Dim myobj as New namespace.classname

then
myobj.subroutinename.

[Azrael-TFX-]

Oh right, I'd been told that you could export functions from them so you could use them in that way.

Ah well, never mind, thx neway

[Vitani]

So VB.NET DLLs are just like ActiveX DLLs?

Can you make "normal" DLLs in VB.NET at all?

[Cander]

Someone lied to you.

[Cander]

Originally posted by Vitani
So VB.NET DLLs are just like ActiveX DLLs?

Can you make "normal" DLLs in VB.NET at all?

No. Still need to use C for that.

But at least you dont have to register dll's anymore.

[laptop_01]

I tried this but I keep getting this error

"File or assembly name myNetAssebly, or one of its dependencies, was not found."


When I referenced the assembly, I used the browse button to go to exact location where I have the dll.

Any idea?

Thanks

[Vitani]

Originally posted by laptop_01

"File or assembly name myNetAssebly, or one of its dependencies, was not found."

Looks like you have a typo int your code, do you not mean myNetAssembly?

[laptop_01]

The typo is in the message I posted. I meant to type MyNetAssembly when I typed out the error message. The code is ok.


I would appreciate it if you have an idea to how to resolve this problem

[Vitani]

is this a compile, or run-time error?

[laptop_01]

This is a run time error.

[laptop_01]

The run time error looks like this:

Run time error '-2147-24894 (80070002)':

File or assembly name myNetAssembly, or one of its dependencies, was not found

[Vitani]

is the DLL in the same folder as the exe that is referencing it?

[laptop_01]

yes

[Vitani]

hmm, does your DLL rely on any other DLLs outside of the .NET framework?

[laptop_01]

yes

Sort of strange things. The C# DLL uses a legacy C DLL. Therefore, inside the C# DLL I have a lot DllImport lines. This woeks fine as long as I am writing a ,NET application that uses the C# DLL,

Now after deleting the C# DLL and recreating it again for sanity check, I can no longer add it to my VB 6.0 project (using the add reference dialog). I now get "Can't add reference to the specified file".

This is getting strange

[PT Exorcist]

are you using your C# dll in a vb6 app? you have to compile it in a special way to it work properly..sometime ago i did that if you search the forum you will find some posts about it

[laptop_01]

Any chance you can remeber the link. I've been searching all day. No luck.

Thanks

[Edneeis]

You have to make the C# dll into a COM dll. I don't know where PT Exorcist's post is but there is a walkthrough in the help files titled 'Walkthrough: Creating COM Objects with Visual Basic .NET'. If there isn't one similar for C# then just translate that one.

[PT Exorcist]

http://www.vbforums.com/showthread.p...&highlight=vb6
it was in C# forum

[laptop_01]

Many thanks.

I was able to communicate with the .NET DLL fine. I am experimenting with argument passing now. Thanks a lot.