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# agent_win32

`agent_win32` walks a live HWND hierarchy into
[agent_core](/docs/packages/agent_core). It classifies native controls from
their class and style, reads current visibility, enabled state, geometry, and
text, and implements the common grant-aware backend.

```cplus
import "agent_win32/agent_win32" as agent;
import "agent_core/auth" as auth;

agent::set_agent_id(button_hwnd, #str_ptr("save\0"));
var surface = agent::open(window_hwnd);
let nodes = surface.describe(auth::reader());
let result = surface.click(auth::operator(), "save");
```

`set_agent_policy` pins Protected, Private, or excluded content to a window.
`mcp_backend()` supplies the same backend vtable used by `agent_mcp` and
`agent_inapp`; the MCP layer is backend-neutral in 0.0.28. Actions retain the
core exposure, affordance, grant, and version checks before sending Win32
messages. Cross-thread `SendMessage` is delivered on the owning window thread.

Facet applications normally use [facet_agent](/docs/packages/facet_agent),
which selects this backend on Windows.