UCDC_SET_CONTROL_LINE_STATE
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
req.bRequest = UCDC_SET_CONTROL_LINE_STATE;