# Use the HCN API at the application-to-host networking boundary

> When should a Windows networking integration use Host Compute Network API objects?

- Canonical URL: https://update.dsesecurity.com/updates/dse-20260908-119-use-the-hcn-api-at-the-application-to-host-networking-boundary/
- Publisher: Detection Systems & Engineering (DSE Security)
- Author: DSE Security Editorial Team
- Published: 2026-09-08T18:15:12+00:00
- Modified: 2026-09-08T18:23:27+00:00
- Last reviewed by DSE: 2026-09-08
- Resource type: Guide
- DSE priority: Information
- Topics: IT, Networks & Infrastructure
- Reading time: 1 minutes

## What you need to know

When should a Windows networking integration use Host Compute Network API objects?

## Potentially affected

Developers integrating Windows VM or container networking with the HCN service API.

## DSE recommendation

Document which application component owns each HCN object and which operations it may perform.

## Article

## Source facts

Microsoft exposes Host Compute Network as a Win32 API for managing virtual networks, endpoints, and related policies on a Windows host. The API creates, changes, deletes, and enumerates networks, endpoints, namespaces, and policies. Operations use object handles that are implemented internally as RPC context handles. Microsoft identifies developers as the API’s audience; end users do not interact with it directly. [Microsoft documentation](https://learn.microsoft.com/en-us/windows-server/networking/technologies/hcn/hcn-top).

## Applicability

Identify the application workflow, Windows platform, networking objects, and schema version the integration will use. Distinguish this host-platform interface from an operator’s tenant-network configuration procedure.

## DSE recommendation

Document which application component owns each HCN object and which operations it may perform. Review object lifetimes, error handling, and cleanup with the developers responsible for the host integration. Keep a small representative configuration document and expected object inventory for the implementation review.

## Verification

In an isolated development environment, exercise the intended create, inspect, update, and cleanup sequence. Compare the resulting objects and connectivity with the application’s expected state. Record failed operations and remaining objects explicitly, and verify that cleanup affects only the objects owned by the test workflow.

## Official references

[Microsoft Learn: Host Compute Network (HCN) service API for VMs and containers](https://learn.microsoft.com/en-us/windows-server/networking/technologies/hcn/hcn-top). Source reviewed September 8, 2026.

## Primary reference

- Name: Host Compute Network (HCN) service API for VMs and containers
- Authority: Microsoft Learn
- URL: https://learn.microsoft.com/en-us/windows-server/networking/technologies/hcn/hcn-top
- Source publication date: Not stated by the source

## Citation and use

Preferred citation: “Use the HCN API at the application-to-host networking boundary,” DSE Security, https://update.dsesecurity.com/updates/dse-20260908-119-use-the-hcn-api-at-the-application-to-host-networking-boundary/
Publishing principles: https://update.dsesecurity.com/updates/dse-updates-editorial-methodology/
Usage and citation policy: https://update.dsesecurity.com/usage/
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