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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
This is a PR for issue **#42260**.
It targets **CmdPal’s WindowWalker** and changes the icon retrieval to
use **SendMessage** to obtain the window’s actual icon, instead of using
the **process icon**.
To support this, I added a new configuration option.
<img width="400" height="401" alt="image"
src="https://github.com/user-attachments/assets/1a2d97a8-ff95-40b0-be42-746c2b1409d4"
/>
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## PR Checklist
- [ ] Closes: #42260
- [ ] **Communication:** @jiripolasek
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx
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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments
Actully, The `ThumbnailHelper` already contains code that converts an
`IntPtr` `hIcon` into an `IRandomAccessStream`, as shown below:
```
private static MemoryStream GetMemoryStreamFromIcon(IntPtr hIcon)
{
var memoryStream = new MemoryStream();
// Ensure disposing the icon before freeing the handle
using (var icon = Icon.FromHandle(hIcon))
{
icon.ToBitmap().Save(memoryStream, System.Drawing.Imaging.ImageFormat.Png);
}
// Clean up the unmanaged handle without risking a use-after-free.
NativeMethods.DestroyIcon(hIcon);
memoryStream.Position = 0;
return memoryStream;
}
private static async Task<IRandomAccessStream?> FromHIconToStream(IntPtr hIcon)
{
var stream = new InMemoryRandomAccessStream();
using var memoryStream = GetMemoryStreamFromIcon(hIcon); // this will DestroyIcon hIcon
using var outputStream = stream.GetOutputStreamAt(0);
using var dataWriter = new DataWriter(outputStream);
dataWriter.WriteBytes(memoryStream.ToArray());
await dataWriter.StoreAsync();
await dataWriter.FlushAsync();
return stream;
}
```
Without modifying (or using) this code, I implemented the almost same
logic directly in `SwitchToWindowCommand` (calling the async code with
`Wait` to block synchronously). The reasons are:
1. I wanted to limit changes to the **WindowWalker** project area. I
don’t expect other extensions to need this behavior.
2. Because this is resource-related work, exposing a public helper that
pulls memory from an `hIcon` pointer seems risky—especially in a class
like `ThumbnailHelper`.
Therefore, I implemented behavior that is nearly identical to the
snippet above.
I did use `using`/`Dispose` where appropriate, but the
`InMemoryRandomAccessStream` created for `IconInfo.FromStream` appears
to use internal referencing; disposing it would be incorrect. For that
reason I didn’t wrap it in a `using`. I’m not entirely sure whether GC
will handle this cleanly.
However, based on the implementation of `FromStream` itself and its
usage elsewhere (e.g., in `ThumbnailHelper`), this seems to be the
correct usage pattern, though I’m not entirely sure.
<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
---------
Co-authored-by: Jiří Polášek <me@jiripolasek.com>
**WARNING:** This PR will probably blow up all in-flight PRs
at some point in the early days of CmdPal, two of us created seperate
`Exts` and `exts` dirs. Depending on what the casing was on the branch
that you checked one of those out from, it'd get stuck like that on your
PC forever.
Windows didn't care, so we never noticed.
But GitHub does care, and now browsing the source on GitHub is basically
impossible.
Closes#38081
