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WM_NIGHT, developed by martona, is a Windows tray utility currently at version 0.2.0.8, with four versions released to date. Its purpose is to bring native-style dark mode to classic Win32 desktop applications that Microsoft's own dark theme never covered, including Explorer, regedit, the Control Panel, and the many legacy dialogs the operating system still renders in bright white. Although Windows shipped a dark theme years ago, the work was left incomplete, and a long tail of classic interfaces continues to display light-mode surfaces. WM_NIGHT addresses this gap by injecting umbra's dark-mode engine directly into the affected processes, theming them at the source rather than applying superficial overlays. The software falls into the category of desktop customization and system theming tools, aimed at users who want a consistent dark appearance across the entire Windows environment. In practice, it themes Explorer and regedit near-perfectly and handles the Control Panel reasonably well, making it useful for anyone who frequently works in these system components, particularly in low-light settings. Coverage can be extended further: any leftover Win32 application can be added to a registry whitelist so that it receives the same dark treatment. A notable technical characteristic is that a signed build launched from a trusted location retains uiAccess privileges, which allows WM_NIGHT to theme elevated windows, such as an elevated regedit or Microsoft Management Console instance, without itself running with elevated rights. This design makes the tool suitable for power users and administrators who routinely operate with administrative tools and want those windows themed as well. Overall, WM_NIGHT serves as a focused solution for completing the dark-mode experience on Windows, targeting precisely the corners of the operating system that the native implementation left behind.
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