# windowHandle

A window handle record carrying id.

Last updated: 2026-09-09

Package: window | Status: source-declared

Tags: cpu, method, source-example, thing, window, yeho

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

```yh
external thing windowHandle
```

- int id: Stores id as int.
- windowHandle(int id): Window handle.
- Valid() returns bool: Valid.

## Use windowHandle

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 sample = windowHandle(1)
Console.Log(Text.From(sample.id))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.window__windowhandle"
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--windowHandle/usage --backend cpu-oracle -o /tmp/yeho-example
/tmp/yeho-example
```


## windowHandle.Valid

A complete caller for this public method. Sample inputs are illustrative; native resources require their owning lifecycle.

Verification: type checked

```yh
using window

// Valid.
windowHandle instance = windowHandle(1)
bool result = instance.Valid()
Console.Log(Text.From(result))

```

Save this beside start.yh as project.mech:

```toml
manifestVersion = "2"
package = "api.example.window__windowhandle"
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--windowHandle/method-Valid-2 --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