windows - why create CLSID_CaptureGraphBuilder2 instance always failed in a machine -

it's real strange issue, machine information below dxdiag. there no error reported, create clsid_capturegraphbuilder2 instance failed in machine. it's okay create clsid_filtergraph. before create clsid_capturegraphbuilder2, have called coinitialize , created clsid_filtergraph. machine has error, dll related interface or function needed call before make work? in advance.

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system information

time of report: 4/24/2010, 09:46:58 machine name: turion operating system: windows xp home edition (5.1, build 2600) service pack 3 (2600.xpsp_sp3_qfe.100216-1510) language: japanese (regional setting: japanese) system manufacturer: filled o.e.m. system model: ms-7145 bios: default system bios processor: amd turion(tm) 64 mobile technology mt-30, mmx, 3dnow, ~1.6ghz memory: 768mb ram page file: 376mb used, 1401mb available windows dir: c:\windows directx version: directx 9.0c (4.09.0000.0904) dx setup parameters: not found dxdiag version: 5.03.2600.5512 32bit unicode

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dxdiag notes

directx files tab: no problems found. display tab 1: no problems found. sound tab 1: no problems found. sound tab 2: no problems found. music tab: no problems found. input tab: no problems found. network tab: no problems found.

don't call cocreateinstance clsid_filtergraph .. pointless. cocreateinstance clsid_createcapturegraph2 , post code use in cocreateinstance , hresult value returned.

the following code "should" work:

icapturegraphbuilder2* pcapture = null; hresult hr = cocreateinstance( clsid_capturegraphbuilder, null, clsctx_inproc_server, iid_icapturegraphbuilder2, (void**) &pcapture) ; 

if doesn't hresult returned in hr , tell (or yourself).

other invalid parameters thing ought able fail here class isn't registered. if majorly amiss ... ought not possible.