How to access a c++ library from a vb.net project?

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brett.mack@gmail.com - 28 Aug 2006 18:40 GMT

Okay, this is a pretty basic question. I've created a static library
using c++. Now, I've started a vb.net project. How do I reference the
functions in the static library? I'm using Visual Studio 2005.

I.E., how do I add the library to the project, and call it's functions?

Or, do I need to declare if as a .dll? When I do that it won't compile,
giving lnk_2019 errors. I'm using the MFC classes in my c++ app.

Any help would be greatly appreciated!!!!

Thank you in advance.

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Bruno van Dooren [MVP VC++] - 28 Aug 2006 19:35 GMT

> Okay, this is a pretty basic question. I've created a static library
> using c++. Now, I've started a vb.net project. How do I reference the
> functions in the static library? I'm using Visual Studio 2005.

You don't.

> I.E., how do I add the library to the project, and call it's functions?

You can't.

> Or, do I need to declare if as a .dll? When I do that it won't compile,
> giving lnk_2019 errors. I'm using the MFC classes in my c++ app.

You can either:
a) create a managed class library of your C++ functions.
b) create an unmanaged dll with exported functions. they can only be C style
functions though.
c) create a COM object and consume that in your VB app.

using a static C++ lib in a vb app is not possible afaik.

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Kind regards,
Bruno van Dooren
bruno_nos_pam_van_dooren@hotmail.com
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brett.mack@gmail.com - 28 Aug 2006 19:42 GMT

How can I accomplish "a"?

The code is here:

<http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ad/ad/example_c
ode_for_receiving_change_notifications.asp>

> > Okay, this is a pretty basic question. I've created a static library
> > using c++. Now, I've started a vb.net project. How do I reference the
[quoted text clipped - 23 lines]
> bruno_nos_pam_van_dooren@hotmail.com
> Remove only "_nos_pam"

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Bruno van Dooren [MVP VC++] - 29 Aug 2006 21:17 GMT

> How can I accomplish "a"?

Start a new C++ CLR class library project.
make sure that /clr is used in your project settings so that you can compile
mixed mode code.

Then you create a managed class, in which you call your unmanaged functions.

For examples and tutorials on mixed mode code, you can go to
www.codeproject.com
and search for interop and C++/CLI. google will also turn up lots of links.

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Kind regards,
Bruno van Dooren
bruno_nos_pam_van_dooren@hotmail.com
Remove only "_nos_pam"

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How to access a c++ library from a vb.net project?

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