[Problem/Bug]: Tooltips and Select options visible in screenshots/screenshares when using SetWindowDisplayAffinity

What happened?

My requirement was to disable screen capture for a WPF application hosting a WebView2 control. In attempting to fulfill this requirement, I utilized the SetWindowDisplayAffinity function from the WinAPI.

Tooltips (HTML title attributes) and HTML select options within the WebView2 control are visible in screenshots and screenshares, even when they are not intended to be captured. These elements appear above the main window of the WPF application, making them visible in captured content.

Below is the screenshot of the application with the issue. Ideally, the whole screenshot should be black but we can see the select options and the tooltip here.

Importance

Important. My app's user experience is significantly compromised.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

124.0.2478.80

SDK Version

1.0.2478.35

Framework

WPF

Operating System

Windows 11

OS Version

22631.3447

Repro steps

1. Open a WPF application with WebView2 control embedded.
2. Navigate to a webpage containing tooltips and select options.
3. Take a screenshot or initiate a screenshare.

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

No, this never worked

Last working version (if regression)

N/A

AB#50877897

Start with the WPF application and embedded WebView2 reproduction described in the issue, using the SetWindowDisplayAffinity WinAPI documentation as context. Reproduce the screenshot or screenshare with an HTML title attribute and select options on Windows 11, then determine why those elements remain visible while the main window is excluded.