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---
page_type: sample
description: "Demonstrates how to create a Windows USB function controller driver using the USB function class extension driver (UFX)."
languages:
- cpp
products:
- windows
---
<!---
name: USB Function Client Driver
platform: KMDF
language: cpp
category: USB
description: Demonstrates how to create a Windows USB function controller driver using the USB function class extension driver (UFX).
samplefwlink: http://go.microsoft.com/fwlink/p/?LinkId=620315
--->
# USB Function Client Driver
This is a skeleton sample driver that shows how to create a Windows USB function controller driver using the USB function class extension driver (UFX).
This sample demonstrates the following:
- Registration with the UFX class extension driver
- Handling USB transfers
- Handling function controller events
- Handling attach and detach notifications
- Handling charger/port detection
- Power management
## Operating system requirements
Windows 10 Mobile
## Customizing the sample for your device
This sample is not a functional driver. It is a skeleton driver intended to illustrate the general design of a UFX client driver. The sample contains a number of comments prefaced with " #### TODO ", which indicates where code will need to be added to perform the controller operation as described in the comment.
## Installation Note
Installation on Windows 10 Mobile requires the creation of a package. To properly interact with the USB UI on Windows 10 Mobile, the package must include a Security Element that specifies the ID_CAP_USB capability with DEVICE_READ and DEVICE_WRITE rights.
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