[Shapelib] Including shapelib.dll in Visual C++ 2008 Express project

[Sanak]

Hi Raphael,

I think that Dllimport definition and re-definition of shapelib api are not
necessary,
but I don't know what is the cause...

So, please refer the attach file (includes shapelib and shapelib-api call
sample(copy from shpcreate.c), and both build successfully in my
environment).

Regards,

Sanak.

2009/6/22 raphael_mws <r.speck at minewolf.com>

>
> Hi Sanak,
>
> thanks for the answer. I tried what you told me and rebuilt the shapelib
> project with the new C/C++ preprocessor commands, but it didn't change
> anything.
>
> I think I am doing something wrong when accessing the DLL functions. This
> is
> a short sample code:
>
> <start>
> #define DllImport __declspec( dllimport )
> #include <iostream>
> #include "stdafx.h"
> #include "D:\Visual Studio 2008\Projects\Shapelib-1_2_10-mod\shapefil.h"
> using namespace std;
>
> DllImport SHPHandle SHPAPI_CALL SHPOpen();
>
> int _tmain(int argc, _TCHAR* argv[])
> {
>        SHPHandle testhandle;   //this works - the compiler finds shapefil.h
>        SHPOpen("test","test");  //this produces the error
>
>        return 0;
> }
> <end>
>
> This is the compiler output:
>
> 1>Verknüpfen... 1>ShapefileCreator.obj : error LNK2019: Verweis auf nicht
> aufgelöstes externes Symbol "_SHPOpen" in Funktion "_wmain". 1>D:\Visual
> Studio
> 2008\Projects\ShapefileCreator\ShapefileCreator\Debug\ShapefileCreator.exe
> :
> fatal error LNK1120: 1 nicht aufgelöste externe Verweise.
>
> The same as before.
>
> I added the path to the DLL/LIB file in the Linker section of the VC
> property page of my project and to the general search paths. This should be
> sufficient, or not?
>
> Regards,
> Raphael
>
>
>
> Sanak wrote:
> >
> > Hi Raphael,
> >
> > It seems that the original Visual C++ shapelib project preprocessor
> > definitions are invalid. (generated shapelib.lib and shapelib.dll symbols
> > are incompatible)
> >
> > Please try as follows,
> > 1. modify shapelib project C/C++ preprocessor definition from VC property
> > page
> >    SHPAPI_CALL=__stdcall
> >      --> SHAPELIB_DLLEXPORT
> > 2. modify each source files(dbfopen.c/shpopen.c/shptree.c) C/C++
> > preprocessor definition from VC property page
> >   SHAPELIB_EXPORTS;SHPAPI_CALL=__stdcall;$(NoInherit)
> >      --> SHAPELIB_DLLEXPORT
> > 3. rebuild shapelib project.
> > 4. import generated shapelib.lib to your project and build.
> >
> > Regards,
> >
> > Sanak.
> >
> > 2009/6/21 raphael_mws <r.speck at minewolf.com>
> >
> >>
> >> Hi folks,
> >>
> >> I am having a real hard time including the shapelib.dll in my VC++ 2008
> >> project. I did the following:
> >>
> >> - recompile the Visual C++ shapelib project from
> >> http://dl.maptools.org/dl/shapelib/contrib/DotNetArchive.zip. This
> worked
> >> fine, and I got the output dll and lib files.
> >>
> >> - include the shapefil.h in my .cpp file successfully
> >>
> >> - tried various possibilities to get the shapelib.dll in the correct
> >> PATH.
> >> Actually, it should be found by the compiler, I even tried putting it
> >> into
> >> C:\WINDOWS\system32 to make sure that's not the problem.
> >>
> >> - experimented with various combinations of __declspec( dllimport ) to
> >> import the functions from the dll
> >>
> >> When I try to compile, I always get the following error:
> >> "error LNK2019: Verweis auf nicht aufgelöstes externes Symbol "_SHPOpen"
> >> in
> >> Funktion "_wmain"."
> >> (in English: unreferenced extern symbol "... )
> >>
> >> Can anybody please give me a hint what I might be doing wrong? Or, even
> >> better, send me a sample VC project using shapelib.dll?
> >>
> >> Thanks and kind regards,
> >> Raphael
> >> --
> >> View this message in context:
> >>
> http://www.nabble.com/Including-shapelib.dll-in-Visual-C%2B%2B-2008-Express-project-tp24132517p24132517.html
> >> Sent from the ShapeLib mailing list archive at Nabble.com.
> >>
> >> _______________________________________________
> >> Shapelib mailing list
> >> Shapelib at lists.maptools.org
> >> http://lists.maptools.org/mailman/listinfo/shapelib
> >>
> >
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> > http://lists.maptools.org/mailman/listinfo/shapelib
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/Including-shapelib.dll-in-Visual-C%2B%2B-2008-Express-project-tp24132517p24136300.html
> Sent from the ShapeLib mailing list archive at Nabble.com.
>
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