I understand you're looking for the (DirectX Control Panel) tool for Windows 10. This utility is part of Microsoft's DirectX SDK and is commonly used by developers to force certain DirectX feature levels, enable debug layers, or emulate older hardware capabilities for testing.
Leo clicked a link from a dusty, forgotten corner of the internet—a repository for legacy development tools. He felt a slight thrill of trepidation. Downloading executable files from sites that looked like they hadn't been updated since the Bush administration was risky, but nostalgia was a powerful motivator.