boost.python error with DirectX

[Ling]

I am using boost.python to wrap C++ function which includes
directmusic libraries to simply play the midi, but lots of linkage
errors "error LNK2001: unresolved external symbol". I wonder if it is
possible to work with DirectX - directmusic libs. Are there any ways
to wrap it?

*************** ******compilati on errors *************** **********
msvc.link.dll bin\msvc-7.1\debug\threa ding-multi\playmusic .pyd bin
\msvc-7.1\debu
g\threading-multi\playmusic .lib
Creating library bin\msvc-7.1\debug\threa ding-multi\playmusic .lib
and object
bin\msvc-7.1\debug\threa ding-multi\playmusic .exp
playmusic.obj : error LNK2001: unresolved external symbol
_GUID_PerfMaste rTempo
playmusic.obj : error LNK2019: unresolved external symbol
__imp__CoUninit ialize@
0 referenced in function "void __cdecl `anonymous
namespace'::Sta rtPlay(void)" (
?StartPlay@?A0x c386fc44@@YAXXZ )
playmusic.obj : error LNK2001: unresolved external symbol
_CLSID_DirectMu sicSegm
ent
playmusic.obj : error LNK2001: unresolved external symbol
_IID_IDirectMus icSegme
nt8
playmusic.obj : error LNK2001: unresolved external symbol
_GUID_DirectMus icAllTy
pes
playmusic.obj : error LNK2001: unresolved external symbol
_CLSID_DirectMu sicPerf
ormance
playmusic.obj : error LNK2001: unresolved external symbol
_IID_IDirectMus icPerfo
rmance8
playmusic.obj : error LNK2019: unresolved external symbol
__imp__CoCreate Instanc
e@20 referenced in function "void __cdecl `anonymous
namespace'::Sta rtPlay(void)
" (?StartPlay@?A0 xc386fc44@@YAXX Z)
playmusic.obj : error LNK2001: unresolved external symbol
_CLSID_DirectMu sicLoad
er
playmusic.obj : error LNK2001: unresolved external symbol
_IID_IDirectMus icLoade
r8
playmusic.obj : error LNK2019: unresolved external symbol
__imp__CoInitia lize@4
referenced in function "void __cdecl `anonymous
namespace'::Sta rtPlay(void)" (?S
tartPlay@?A0xc3 86fc44@@YAXXZ)
bin\msvc-7.1\debug\threa ding-multi\playmusic .pyd : fatal error
LNK1120: 11 unres
olved externals

call "C:\Program Files\Microsoft Visual Studio .NET
2003\Vc7\bin\vc vars3
2.bat" >nul
link /NOLOGO /INCREMENTAL:NO /DLL /DEBUG /subsystem:conso le /out:"bin
\msvc-7.1\d
ebug\threading-multi\playmusic .pyd" /IMPLIB:"bin\msv c-7.1\debug
\threading-multi\
playmusic.lib" /LIBPATH:"C:\Pan da3D-1.4.0\python\li bs" @"bin
\msvc-7.1\debug\th
reading-multi\playmusic .pyd.rsp"
if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL%
if exist "bin\msvc-7.1\debug\threa ding-multi
\playmusic.pyd. manifest" (
mt -nologo -manifest "bin\msvc-7.1\debug\threa ding-multi
\playmusic.p
yd.manifest" "-outputresource: bin\msvc-7.1\debug\threa ding-multi
\playmusic.pyd; 2
"
)

....failed msvc.link.dll bin\msvc-7.1\debug\threa ding-multi
\playmusic.pyd bin\msv
c-7.1\debug\threa ding-multi\playmusic .lib...
....removing bin\msvc-7.1\debug\threa ding-multi\playmusic .lib
....failed updating 2 targets...

*************** *************** ************com piliation
errors********* *****

In C++, Inside "playmusic.cpp" , it needs to include following
DirectMusic libs. The link errors mainly related to directmusic
stuff.

#include <dmusicc.h>
#include <dmusici.h>
#include <dmusicf.h>

************* playmusic.cpp** *************** ********

#include <boost/python/class.hpp>
#include <boost/python/module.hpp>
#include <boost/python/def.hpp>
#include "boost/python/detail/wrap_python.hpp "

//using namespace std;
#include <windows.h>
#include <dmusicc.h>
#include <dmusici.h>
#include <dmusicf.h>

namespace {
//-----------------------------------------------------------------------------
// Defines, constants, and global variables
//-----------------------------------------------------------------------------
void StartPlay();

IDirectMusicLoa der8* g_pLoader = NULL;
IDirectMusicPer formance8* g_pPerformance = NULL;
IDirectMusicSeg ment8* g_pSegment = NULL;
FLOAT fTempo;

void StartPlay() {
// Initialize COM
CoInitialize(NU LL);

// Create loader object
CoCreateInstanc e( CLSID_DirectMus icLoader, NULL, CLSCTX_INPROC,
IID_IDirectMusi cLoader8, (void**)&g_pLoa der );

..............
..............
namespace python = boost::python;

BOOST_PYTHON_MO DULE(playmusic)
{
python::def("St artPlay", StartPlay);
}

*********** playmusic.cpp** *************** **********

The code in void StartPlay() inside "playmusic. cpp" can be compiled
and executed successfully before in C++, so I extract that part.
Any ideas? Thanks so much for your help