Add NFC CX sample driver.

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+---
+topic: sample
+name: NFC CX client driver sample
+description: Sample code for creating a NFC driver using the NFC Class Extension.
+generateZip: true
+author: windows-driver-content
+languages:
+- cpp
+products:
+- windows
+technologies:
+- WDF
+- UMDF2
+---
+
+# NFC CX client driver sample
+
+A template for creating an NFC functional driver using the NFC Class Extension (CX) driver.
+
+This is a complete version of the code created in the [NFC CX quick start guide](https://docs.microsoft.com/windows-hardware/drivers/nfc/nfc-class-extension-quickstart).
+
+## Prerequisites
+
+To use the NFC CX, your NFC Controller must implement NFC Forum's [NFC Controller Interface (NCI)](https://nfc-forum.org/our-work/specifications-and-application-documents/specifications/nfc-controller-interface-nci-specification/) protocol.
+
+In addition, the NFC CX requires the driver to use the [UMDF 2](https://docs.microsoft.com/windows-hardware/drivers/wdf/overview-of-the-umdf) framework.
+
+## Universal windows driver compliant
+
+This sample builds a Universal Windows Driver. It uses only APIs and DDIs that are included in OneCoreUAP.
+
+## File manifest
+
+### WDK
+
+- [NfcCx.h](https://docs.microsoft.com/windows-hardware/drivers/ddi/content/nfccx/) - The NFC CX's client driver API. (This file is included in the WDK.)
+
+### Project
+
+- [Driver.cpp](windows-drivertemplate-nfc/Driver.cpp)
+  - `DriverEntry` - Driver initialization.
+
+- [Device.cpp](windows-drivertemplate-nfc/Device.cpp)
+  - `DeviceContext::AddDevice` - Device initialization, including initializing the NFC CX driver.
+  - `DeviceContext::WriteNciPacket` - The implementation of the [`EvtNfcCxWriteNciPacket`](https://docs.microsoft.com/windows-hardware/drivers/ddi/content/nfccx/nc-nfccx-evt_nfc_cx_write_nci_packet) callback function.
+  - `DeviceContext::ReadNciPacket` - Demonstrates calling [`NfcCxNciReadNotification`](https://docs.microsoft.com/windows-hardware/drivers/ddi/content/nfccx/nf-nfccx-nfccxncireadnotification).
+
+- [Device.h](windows-drivertemplate-nfc/Device.h)
+  - `DeviceContext` - The class that stores the device instance's state.