🖥️ Windows Hot Corners

A lightweight, native C# application that brings the productivity of macOS/Linux "Hot Corners" to Windows 10 and 11. Move your mouse cursor to any screen corner to trigger system actions instantly.

📸 Overview

Tired of pressing Win+Tab? Just flick your mouse to the top-left corner.

This tool runs quietly in the system tray and monitors your mouse cursor position. When the cursor hits a screen corner, it executes a pre-configured action. It features a custom-built, modern UI that automatically adapts to your Windows System Theme (Dark/Light Mode).

📸 Screenshots

✨ Key Features

• 🎨 Theme-Aware UI: The settings window automatically detects and switches between Dark and Light modes based on your Windows personalization settings.
• ⚡ Zero Latency: Built with native Win32 APIs (User32.dll, Dwmapi.dll) for instant trigger response.
• 🎯 Corner-Specific Configurations: Set up completely independent custom apps or hotkeys for each of the four screen corners.
• 🚀 Extensive Action Library:
  • Window Management: Task View (Win+Tab), Show Desktop, Minimize All Windows.
  • System Actions: Lock Screen, Action Center, File Explorer, Task Manager, Start Menu, Start Screen Saver.
  • Custom App Launcher: Run any .exe, script, or command.
  • Custom Hotkey Recorder: Bind complex keyboard shortcuts or media keys (Play/Pause, Volume Control) natively using the built-in low-level keyboard hook.
• ⚙️ Fine-Tuning: Adjustable corner sensitivity (pixels), trigger delay (ms), and cooldown timer (ms) to prevent accidental triggers.
• 👻 Unobtrusive: Minimizes to the System Tray and uses negligible system resources (< 10MB RAM).

🚀 Getting Started

Prerequisites

• OS: Windows 10 or Windows 11.

Installation

1. Download the latest WindowsHotCorners.exe from the Releases Page.
2. Place the executable in a permanent folder (e.g., C:\Tools\HotCorners).
3. Double-click to run.
4. Configure your corners and check "Run at Windows Startup".
5. Click Save & Minimize.

🛠️ Compilation (For Developers)

The project is designed as a Single-File Application for easy portability.

Build Requirements:

• .NET SDK 10.0 or newer.

Build Command: Use the provided build_script.bat or run:

dotnet publish -c Release -r win-x64 --self-contained true -p:PublishSingleFile=true

⚙️ Configuration

Configuration is stored in %LocalAppData%\HotCornersApp\config.json.

Supported Actions:

• None

• Trigger VirtualSpace Grid (Ctrl+Shift+Tab) Download VirtualSpace

• Native Task View (Win+Tab)

• Launch Custom App (Independent per corner)

• Show Desktop (Win+D)

• Lock Screen

• Action Center (Win+A)

• File Explorer (Win+E)

• Minimize All Windows (Win+M)

• Start Menu (Win)

• Start Screen Saver

• Task Manager (Ctrl+Shift+Esc)

• Custom Hotkey (Independent per corner, supports modifiers & media keys)

⚠️ Disclaimer

This tool uses low-level keyboard hooks (WH_KEYBOARD_LL) for recording custom hotkeys and simulates keyboard input (keybd_event) to trigger actions. Ensure you do not have conflicting hotkey software running that might intercept these events.

📄 License

This project is licensed under the MIT License.

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Created by @osmanonurkoc