---
page_type: sample
description: "Demonstrates how to write a KMDF driver to utlize the Windows Platform Runtime Mechanism (PRM) direct-call interface."
languages:
- cpp
products:
- windows
- windows-wdk
---

# PrmFunc sample application

The *PRMFunc* sample demonstrates how to write a KMDF driver to utlize the Windows Platform Runtime Mechanism (PRM) direct-call interface.

## Related topics

[Platform Runtime Mechanism Specification](https://uefi.org/sites/default/files/resources/Platform%20Runtime%20Mechanism%20-%20with%20legal%20notice.pdf/)