Dave Friedel
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Monitor Control Manager
A lightweight Windows utility for controlling monitor settings via DDC/CI. Adjust brightness, contrast, input source, and power settings directly from your system tray.
Features
- System Tray Integration - Clean popup interface accessible from taskbar
- Multi-Monitor Support - Control all DDC/CI compatible displays
- Brightness & Contrast - Slider controls with real-time feedback
- Input Source Switching - Auto-detects available inputs (HDMI, DisplayPort, DVI, VGA)
- Power Management - On, Sleep, and Off controls
- Multi-Language - Auto-detects system language (English, Spanish, French, German, Chinese, Japanese, Portuguese, Italian, Hindi)
Requirements
- Windows 10/11
- .NET 9.0 Runtime
- DDC/CI compatible monitor(s)
Note: Most external monitors support DDC/CI, but some laptop internal displays and certain monitors may not support this protocol.
Installation
From Release
Download the latest release and run the executable. The app will appear in your system tray.
Build from Source
git clone https://git.marketally.com/misc/ControlMyMonitorManagement.git
cd ControlMyMonitorManagement
dotnet build
dotnet run --project DellMonitorControl
Usage
- Launch the application - it minimizes to system tray
- Click the tray icon to open the control panel
- Adjust brightness/contrast with sliders
- Select input source from dropdown (if multiple available)
- Toggle power state with the power button
- Click outside the popup to close
Project Structure
| Project | Description |
|---|---|
DellMonitorControl |
System tray application with popup UI |
ControlMyMonitorManagement |
Full WPF application (alternative) |
Library |
Core DDC/CI operations via ControlMyMonitor.exe |
Language |
Localization resources (9 languages) |
CMMModel |
Data models |
Tester |
Unit tests |
Technical Details
DDC/CI Protocol
The application uses DDC/CI (Display Data Channel/Command Interface) to communicate with monitors through the display cable. This allows software control of settings normally accessed via physical monitor buttons.
VCP Codes Used
| Code | Function | Values |
|---|---|---|
10 |
Brightness | 0-100 |
12 |
Contrast | 0-100 |
60 |
Input Source | 1=VGA, 15=DP, 17=HDMI |
D6 |
Power Mode | 1=On, 4=Sleep, 5=Off |
Credits
- Original Project: rictirse - ControlMyMonitorManagement base
- DDC/CI Engine: Nir Sofer - ControlMyMonitor (freeware)
- Enhancements: David H Friedel Jr - UI improvements, input switching, localization
License
MIT License - See LICENSE for details.
Note: ControlMyMonitor.exe is freeware by Nir Sofer (free distribution, no modification).
MIT License (for new contributions only) Copyright (c) 2026 David H Friedel Jr Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. --- NOTICE: This project contains components with different licensing terms: 1. Original code by DangWang - No explicit license was provided with the original repository. Use at your own discretion. 2. ControlMyMonitor.exe by Nir Sofer (NirSoft) - Freeware license: - Free distribution allowed - No commercial use or sale - No modification - See: https://www.nirsoft.net 3. New contributions (brightness/contrast controls, input source switching, 9-language localization) - MIT License as above.