1# UsbSerial_DeviceHandle 2<!--Kit: Driver Development Kit--> 3<!--Subsystem: Driver--> 4<!--Owner: @lixinsheng2--> 5<!--Designer: @w00373942--> 6<!--Tester: @dong-dongzhen--> 7<!--Adviser: @w_Machine_cc--> 8 9## Overview 10 11Defines the data structures (opaque) for the USB serial port device. 12 13**Since**: 18 14 15**Related module**: [SerialDdk](capi-serialddk.md) 16 17**Header file:** [usb_serial_types.h](capi-usb-serial-types-h.md) 18