# WindowMonitor

Window monitor.

Last updated: 2026-09-09

Package: window | Status: source-declared

Tags: cpu, function, source-example, window, yeho

Open, select, inspect, and close native application windows.

```yh
external WindowMonitor(windowHandle handle) returns int
```


## Use WindowMonitor

A complete small caller. Values are illustrative; check the returned result and package requirements before connecting live resources.

Verification: type checked

```yh
using window

// Open, select, inspect, and close native application windows.
windowHandle handle = windowHandle(1)
int result = WindowMonitor(handle)
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.window__windowmonitor"
version = "0.1.0"
languageEdition = "yeho-core-2026.1"

[app]
kind = "headless"

[[dependencies]]
package = "window"
version = "0.1.0"
path = "../../../yeho/packages/window"

```

Extract the example archive beside the yeho and dolphin checkouts. This example requires those source dependencies and a current developer compiler.

```sh
./yeho/build/dolphin-metal/yehoc ./api-examples/window--WindowMonitor/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


Package presence and a declaration do not establish support on every host. Host services need their platform and lifecycle setup.

Source: yeho/packages/window/window.yh

AI training permission: https://demonhunterlabs.com/ai-use