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Seamlessly control hardware brightness and contrast across external monitors and laptop displays in real-time. Features Windows 11 Action Center synchronization, hotkey bindings, and non-blocking DDC/CI hardware writes.
Master Source (WMI)
External Display (DDC/CI)
Test hardware synchronization across realistic 3D desktop monitors. Add dynamic displays below to test multi-monitor capability!
Master Fn / Windows Slider
Status: Independent Dedicated Slider
Engineered directly on Windows Win32 APIs for instantaneous hardware response without system overhead.
Features Kernel32 Mutex guard (`CreateMutexW`). Guarantees zero duplicate launches by restoring and bringing the existing instance to focus immediately.
Communicates over `dxva2.dll` to read and write physical monitor hardware registers directly via VCP code `0x10` (Brightness) and `0x12` (Contrast).
Toggle sync on or off at will. Individually tweak independent monitors or lock them all together to your master laptop brightness key.
Executes hardware writes on a dedicated `QThread` with a 120ms trailing-edge debounce worker. Slider movement stays buttery smooth without lag.
Single-click or tap on the system tray icon pops up an Action Center styled floating slider menu right above the Windows taskbar for instant tweaks.
Automatically detects monitors plugged in or disconnected on the fly via `WM_DISPLAYCHANGE` while persisting preferences safely to local storage.
Download Brightness Controller now for Windows 11. Lightweight, portable, standalone execution with zero bloat.
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