KSDDKAPI HRESULT WINAPI KsOpenDefaultDevice	(	REFGUID	Category,
		ACCESS_MASK	Access,
		PHANDLE	DeviceHandle
	)

Definition at line 108 of file ksproxy.cpp.

Referenced by CKsClockForwarder_Constructor(), and CKsQualityForwarder_Constructor().

{
    HDEVINFO hList;
    SP_DEVICE_INTERFACE_DATA DeviceInterfaceData;
    PSP_DEVICE_INTERFACE_DETAIL_DATA_W DeviceInterfaceDetailData;
    WCHAR Path[MAX_PATH+sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_W)];

    /* open device list */
    hList = SetupDiGetClassDevsW(&Category, NULL, NULL, DIGCF_DEVICEINTERFACE  | DIGCF_PRESENT);

    if (hList == INVALID_HANDLE_VALUE)
    {
        /* failed */
        return MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, GetLastError());
    }

    /* setup parameters */
    DeviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);

    if (SetupDiEnumDeviceInterfaces(hList, NULL, &Category, 0, &DeviceInterfaceData))
    {
        /* setup interface data struct */
        DeviceInterfaceDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA_W)Path;
        DeviceInterfaceDetailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_W);

        /* get device interface details */
        if (SetupDiGetDeviceInterfaceDetailW(hList, &DeviceInterfaceData, DeviceInterfaceDetailData, sizeof(Path), NULL, NULL))
        {
            /* open device */
            *DeviceHandle = CreateFileW(DeviceInterfaceDetailData->DevicePath, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_FLAG_OVERLAPPED | FILE_ATTRIBUTE_NORMAL, NULL);

            if (*DeviceHandle != INVALID_HANDLE_VALUE)
            {
                /* operation succeeded */
                SetupDiDestroyDeviceInfoList(hList);
                return NOERROR;
            }
        }
    }

    /* free device list */
    SetupDiDestroyDeviceInfoList(hList);

    /* failed */
    return MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, GetLastError());
}

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