[Python.NET] Use of c++ dll in python

[Brian Lloyd]

Lalit,

If your C++ dll is a plain (unmanaged, machine-code) dll, you probably want to
take a look at ctypes:

http://starship.python.net/crew/theller/ctypes/

Python for .NET doesn't specifically help you use arbitrary unmanaged
dlls (but you
should have no problem using ctypes within Python for .NET).

-Brian

On 4/4/06, Lalit DIGARI <lalit.digari at st.com> wrote:
> Thanks mark,
> How could I use dll's exposed function with in python script?
> Reagrd's
> lalit
>
> -----Original Message-----
> From: Mark McMahon [mailto:mark.mcmahon at eur.autodesk.com]
> Sent: Monday, April 03, 2006 5:41 PM
> To: Lalit DIGARI; pythondotnet at python.org
> Subject: RE: [Python.NET] Use of c++ dll in python
>
>
> Hi Lalit,
>
> This is not really the group to ask this question - as it doesn't have
> anything to do with python.NET.
>
> But other then that I can answer your question I think :-)
>
> You say a "C++ DLL". First thing is you need to make sure that your
> functions are correctly exported in an 'unmangled' form.
>
> What I do for this is the following:
>
> // create a macro DLLEXPORT for those methods you want to export
> #define  DLLEXPORT   extern "C" __declspec(dllexport)
>
> // the following may be optional - but can make things easier
> #define  VB 	__stdcall
>
> // add the macro to your function prototypes
> DLLEXPORT int VB InitDialogFromFile   (char const *const fileName);
>
> // in the CPP file define your function as you would normally do int VB
> InitDialogFromFile(char const * const fileName) {
> 	//FUNC BODY
> }
>
> You may also need to create a .def file
>
> ; Declares the module parameters for the DLL.
> NAME MyCPPDll.dll
> DESCRIPTION  'Description of your DLL'
> EXPORTS
> 	// the following line can be used to rename exports
> 	//InitDialogFromFile_renamed = InitDialogFromFile
> 	InitDialogFromFile
>
> Once you add that to the project - it will make sure that no mangling
> happens (sometimes even after doing extern "C" you still get a leading
> underscore!)
>
> Mark
>
>
> -----Original Message-----
> From: pythondotnet-bounces at python.org
> [mailto:pythondotnet-bounces at python.org] On Behalf Of Lalit DIGARI
> Sent: Monday, April 03, 2006 7:22 AM
> To: pythondotnet at python.org
> Subject: [Python.NET] Use of c++ dll in python
>
> Hello All ,
> I have devloped a c++ dll named mydll in c++ how can I access it with in
> python script using ctype... Regard's Lalit
>
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