device open)

        HANDLE hDevice=CreateFile("\\\\.\\LKbtv1",

                GENERIC_READ  | GENERIC_WRITE, 0, NULL,

                OPEN_EXISTING, 0, NULL);

device close)

CloseHandle(hDevice);

register capture event)

        // give event handle

        DeviceIoControl(

                hDevice, IOCTL_TEST_REGISTEREVENT,

                (PVOID)&g_hCaptureEvent, sizeof(HANDLE),

                NULL, 0, &result, NULL);

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