Re: Exporting functions from C# .dll for other programs - C# Discussion Boards

Re: Exporting functions from C# .dll for other programs

27-Apr-09 9:22

Hi I need to write a C# .dll library which exports functions accessible from good old win32 API applications. (not the usual other way around, calling win API functions from C#) Is this possible?
If so, how do I make them as regular (global) functions, without being nested in some namespace and class?
The win32 api application requires for example "void FunctionA()" and "void FunctionBee()" to be exported in my dll, but as far as I know, C# does not allow for functions to be on their own, without being in a namespace and class. Other than that, I do not know how to mark them as "exported", some attribute or something?

Please point me in the right direction, any help appreciated.
Thanks, H.

Christian Graus27-Apr-09 9:50

Christian Graus

27-Apr-09 9:50

Member 1033907 wrote:
If so, how do I make them as regular (global) functions, without being nested in some namespace and class?

Not possible in .NET.

You can't 'export' them, you'd need to write a COM dll and access them via COM.

Christian Graus

Driven to the arms of OSX by Vista.

"I am new to programming world. I have been learning c# for about past four weeks. I am quite acquainted with the fundamentals of c#. Now I have to work on a project which converts given flat files to XML using the XML serialization method" - SK64 ( but the forums have stuff like this posted every day )

Re: Exporting functions from C# .dll for other programs

Member 103390727-Apr-09 11:27

Re: Exporting functions from C# .dll for other programs

27-Apr-09 11:27

That is bad news, I'll probably need to reconsider the whole approach. One last shot - if I leave out the requirement that they need to be standalone functions and write something like

namespace Space
{
  public class Something
  {
    public static void FunctionA()
    {
      // do something
    }
  }
}

Can this FunctionA be somehow accessed from an unmanaged C++ win32 application? (no fancy com, mfc, nothing). If so, could you give me a little clue how (on the c++ side)? Or another way to make it work with just the C++ app and the C# dll? (I have access to both)

Thanks in advance, H.

Dave Kreskowiak27-Apr-09 18:37

Dave Kreskowiak

27-Apr-09 18:37

Member 1033907 wrote:
Can this FunctionA be somehow accessed from an unmanaged C++ win32 application? (no fancy com, mfc, nothing).

No.

Member 1033907 wrote:
Or another way to make it work with just the C++ app and the C# dll? (I have access to both)

Using C# to generate the .DLL, we've already told you the options you have.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Exporting functions from C# .dll for other programs

Member 103390727-Apr-09 21:05

Re: Exporting functions from C# .dll for other programs

27-Apr-09 21:05

Ok, thanks, no c# then.
Out of curiosity - what project type one selects when creating COM dll in Visual Studio? Is it "ATL Project" or something else? I've never done that (and probably won't).

H.

Dave Kreskowiak28-Apr-09 12:18

Dave Kreskowiak

28-Apr-09 12:18

Just a class library. The COM exposure is all in how you attribute your code.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Exporting functions from C# .dll for other programs

Dave Kreskowiak27-Apr-09 11:19

Dave Kreskowiak

27-Apr-09 11:19

Christian is correct. The only "easy" interface you have is to expose your classes, properties, and method is through COM.

You could try to host the .NET CLR in your Win32 app, but that's a severe pain in the ass to do. Read[^]

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

Re: Exporting functions from C# .dll for other programs

Member 103390727-Apr-09 11:37

how can i change font to hindi in textbox??

27-Apr-09 11:37

Thanks. Please read my answer above, I'll be glad if you have something to say. Otherwise I'll probably forget about C# altogether.
BTW: "through COM" means that I 1) write the C# .dll with the functions (as public static methods) 2) write another library which receives calls from the win32 application and forwards them to the C# dll?

Thanks, H.

Alok Sharma ji27-Apr-09 9:15

27-Apr-09 9:15

i tried it again and agian but it shows only blank squares on running the project.
i also have these fonts installed.

Saksida Bojan27-Apr-09 9:22

Saksida Bojan

27-Apr-09 9:22

On your Form, try Changing property "Language" from "(Default)" to "Hindi"

Alok Sharma ji27-Apr-09 9:28

27-Apr-09 9:28

sorry sir i dont see any property name language in my textbox property window my ide is vs2008

Saksida Bojan27-Apr-09 9:31

Saksida Bojan

27-Apr-09 9:31

Form it self, not Textbox

Alok Sharma ji27-Apr-09 9:33

27-Apr-09 9:33

ok i got it but still the prblm exists any step by step suggestion or guide article

Smile | :)

Saksida Bojan27-Apr-09 9:52

Saksida Bojan

27-Apr-09 9:52

I got it by bringing Font box open, i tried with DevLys 010 and i got it. But for the first time when i changed, by changing Name of font without bringing font box, it didnt change

Alok Sharma ji27-Apr-09 9:56

27-Apr-09 9:56

ok i will try that thanx.

Amazon Web Services

Kevin Marois27-Apr-09 8:31

27-Apr-09 8:31

I need help setting up a project that can search for products at Amazon, return a list of matches, and possibly even make purchases via a WS.

Anyone have experience with Amazon Web Services that could point me in the right direction?

Thanks

Everything makes sense in someone's mind

led mike27-Apr-09 9:00

led mike

27-Apr-09 9:00

:yawn:[^]

Kevin Marois27-Apr-09 9:07

27-Apr-09 9:07

Huh?

Everything makes sense in someone's mind

agent00zelda27-Apr-09 9:09

agent00zelda

27-Apr-09 9:09

Click the link, watch, wait a moment, and you'll have your answer(s)

Kevin Marois27-Apr-09 9:32

27-Apr-09 9:32

Smart I like. Smart ass I can do without.

First, I have already spent considerable time searching aws.amazon.com, second I spent enough time searching Google.

If I had found useful info, I wouldn't be posting here.

If you don't have anything useful to contribute, then don't contribute.

Everything makes sense in someone's mind

led mike27-Apr-09 9:43

led mike

27-Apr-09 9:43

The information accessible from the Google search I provided is useful to developers capable of developing the project you described. If that is not you, that's not my fault. So for trying to blame me for your shortcomings I have a great big F*** OFF A**HOLE in reply.

Kevin Marois27-Apr-09 9:49

27-Apr-09 9:49

Well, other people had no problem posting a decent reply.

If you're just looking to troll, go somewhere else.

The world is full of A$$holes, don't be one yourself.

I'm done with you.

Everything makes sense in someone's mind