HRESULT IltmmVideoFormats_get_Count_Example (IltmmCapture *pCapture) { HRESULT hr; long lIndex, lCount, lSelection, lWidth, lHeight, lCompression, lBitCount; VARIANT_BOOL vSelected; BSTR SubTypeName, SubTypeFriendlyName, Subtype; IltmmVideoFormats* pVidCapFormats = NULL; IltmmVideoFormat* pVidFormat = NULL; hr = IltmmCapture_get_VideoCaptureFormats (pCapture, &pVidCapFormats); if (FAILED(hr)) return hr; hr = IltmmVideoFormats_get_Count (pVidCapFormats, &lCount); if (FAILED(hr)) { IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormats_get_Selection (pVidCapFormats, &lSelection); if (FAILED(hr)) { IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } if (lSelection != 0) { hr = IltmmVideoFormats_put_Selection (pVidCapFormats, 0); if (FAILED(hr)) { IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } } hr = IltmmVideoFormats_Item (pVidCapFormats, 0, &pVidFormat); if (FAILED(hr)) { IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormat_get_Selected (pVidFormat, &vSelected); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } if (vSelected == VARIANT_FALSE) { hr = IltmmVideoFormat_put_Selected (pVidFormat, VARIANT_TRUE); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } } hr = IltmmVideoFormat_get_SubTypeName (pVidFormat, &SubTypeName); SysFreeString(SubTypeName); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormat_get_SubTypeFriendlyName (pVidFormat, &SubTypeFriendlyName); SysFreeString(SubTypeFriendlyName); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormat_get_Width (pVidFormat, &lWidth); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormat_get_Height (pVidFormat, &lHeight); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormat_get_Compression (pVidFormat, &lCompression); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } hr = IltmmVideoFormat_get_BitCount (pVidFormat, &lBitCount); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } Subtype = SysAllocString(ltmmMEDIASUBTYPE_RGB24); hr = IltmmVideoFormats_Find (pVidCapFormats, Subtype, 1024, 768, &lIndex); SysFreeString(Subtype); if (FAILED(hr)) { IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return hr; } IltmmVideoFormat_Release(pVidFormat); pVidFormat = NULL; IltmmVideoFormats_Release(pVidCapFormats); pVidCapFormats = NULL; return S_OK; }