Windows CE Directshiw Filter Error

Windows CE Directshow Filter Error :
-------------------------------------
I developed the Ball Source filter in Windows CE;
I got these errors:
Creating library Pocket PC 2003 (ARMV4)\Release/Ball_Filter.lib and object Pocket PC 2003 (ARMV4)\Release/Ball_Filter.exp
1>fball.obj : error LNK2019: unresolved external symbol "public: __cdecl CSourceStream::CSourceStream(wchar_t *,long *,class CSource *,wchar_t const *)" (??0CSourceStream@@QAA@PA_WPAJPAVCSource@@PB_W@Z) referenced in function "public: __cdecl CBallStream::CBallStream(long *,class CBouncingBall *,wchar_t const *)" (??0CBallStream@@QAA@PAJPAVCBouncingBall@@PB_W@Z)
1>fball.obj : error LNK2001: unresolved external symbol "protected: virtual long __cdecl CSourceStream::QueryId(wchar_t * *)" (?QueryId@CSourceStream@@MAAJPAPA_W@Z)
1>fball.obj : error LNK2019: unresolved external symbol "public: __cdecl CSource::CSource(wchar_t *,struct IUnknown *,struct _GUID)" (??0CSource@@QAA@PA_WPAUIUnknown@@U_GUID@@@Z) referenced in function "private: __cdecl CBouncingBall::CBouncingBall(struct IUnknown *,long *)" (??0CBouncingBall@@AAA@PAUIUnknown@@PAJ@Z)
1>fball.obj : error LNK2001: unresolved external symbol "public: virtual long __cdecl CSource::FindPin(wchar_t const *,struct IPin * *)" (?FindPin@CSource@@UAAJPB_WPAPAUIPin@@@Z)
1>fball.obj : error LNK2001: unresolved external symbol "public: virtual long __cdecl CBaseFilter::JoinFilterGraph(struct IFilterGraph *,wchar_t const *)" (?JoinFilterGraph@CBaseFilter@@UAAJPAUIFilterGraph@@PB_W@Z)
1>fball.obj : error LNK2001: unresolved external symbol "public: virtual long __cdecl CBaseFilter::QueryVendorInfo(wchar_t * *)" (?QueryVendorInfo@CBaseFilter@@UAAJPAPA_W@Z)
1>Pocket PC 2003 (ARMV4)\Release/Ball_Filter.dll : fatal error LNK1120: 6 unresolved externals


Solution Steps:
--------------------
I modified the things in "Release" Mode:

it may be due to calling convention mechanism;
But ARM doesnt have calling convention compiler option( /Gr, Gd,Gz);
Calling convention is applicable only to x86 machines now I am using ARM;

I doubt whether the Strmbase.lib is built in x86; if it is so means, Previously I developed the dshow Player application
with this same "strmbase.lib"; So there is nothing wrong in lib;
I closely watched the all the error fns; they are all contains wchar_t;
It may due to some unicode problem?
Solution:
----------
Project->Properties->C++ ->Language ->
Treat wchar_t as Built In Type:Yes

I just modified this property to No;
Treat wchar_t as Built In Type: No

Now all the linker errors are resolved;
Now I am not having any error;


Note:
---------
Even though I did all the above things in Debug Mode, I got the following error:
Creating library Pocket PC 2003 (ARMV4)\Debug/Ball_Filter.lib and object Pocket PC 2003 (ARMV4)\Debug/Ball_Filter.exp
fball.obj : error LNK2001: unresolved external symbol "public: virtual unsigned long __cdecl CBaseFilter::NonDelegatingRelease(void)" (?NonDelegatingRelease@CBaseFilter@@UAAKXZ)
Pocket PC 2003 (ARMV4)\Debug/Ball_Filter.dll : fatal error LNK1120: 1 unresolved externals
For Debug Mode:
I have added this code within the CSource derived class;
public:
STDMETHODIMP_(ULONG) NonDelegatingAddRef()
{
return InterlockedIncrement(&m_cRef);
}


//-----------------------------------------------------------------------------
// Decrement the reference count for an interface
// ////////////////////////////////////////
STDMETHODIMP_(ULONG) NonDelegatingRelease()
{
if(InterlockedDecrement(&m_cRef) == 0)
{
delete this;
return 0;
}
return m_cRef;
}
Now it is working fine;

I have successfully build the filter code;