Trouble in playing wma file in smartphone   

hi:
I run a basic sample on smartphone device to play a wma file, but get a

error....
Here is the code snippet:
---------------------------------------------------------------------------------------------
       IGraphBuilder *pGraphBuilder;
        IMediaControl *pMediaControl;
        HRESULT hr = CoInitialize(NULL);

        if(FAILED(hr))
        {
           MessageBox(L"ERROR: failed to initialize COM library!!!");
            return;
        }

        hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC,
IID_IGraphBuilder, (void **) &pGraphBuilder);
        if(FAILED(hr))
        {
            MessageBox(L"ERROR: failed to create Filter Graph Manager
instance!!");
            return;
        }

        pGraphBuilder->QueryInterface(IID_IMediaControl, (void **)
&pMediaControl);


        hr = pGraphBuilder->RenderFile(L"\\test.wma", NULL);
        if(SUCCEEDED(hr))
        {
            pMediaControl->Run();
            MessageBox(L"click ok to end playback...");
        }
        else
            MessageBox(L"ERROR: failed to run Filter Graph...");

        pMediaControl->Release();
        pGraphBuilder->Release();
        CoUninitialize();
---------------------------------------------------------------------------------------------
I get a 0x80040216 (VFW_E_NOT_FOUND) error on RenderFile. The
description of VFW_E_NOT_FOUND is "An object or name was not found".

Could someone provide a clue?? 
Best Regards.

date: 5 Apr 2006 23:57:42 -0700   author:   Tony

Re: Trouble in playing wma file in smartphone   

On 5 Apr 2006 23:57:42 -0700, Tony wrote:

>        hr = pGraphBuilder->RenderFile(L"\\test.wma", NULL);
> ---------------------------------------------------------------------------------------------
> I get a 0x80040216 (VFW_E_NOT_FOUND) error on RenderFile. The
> description of VFW_E_NOT_FOUND is "An object or name was not found".

This error suggests that the file was not found.  I don't know what the
convention is for file specs for SmartPhones probably better off asking in
a wince group for that part.

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date: Thu, 6 Apr 2006 06:44:31 -0600   author:   The March Hare [MVP]