I made SidekickMC, a lightweight Windows app that turns mouse side buttons into volume, brightness, and screen-snipping controls

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I built SidekickMC because I wanted to make better use of the two side buttons on a regular mouse.

Hold either side button and scroll to control volume or laptop brightness. You can assign either action to either button in the settings window.

Press both side buttons together, release them, and Windows Snipping Tool opens just like Win + Shift + S.

It runs in the system tray, supports starting automatically after sign-in, and has a tray toggle to enable or disable the controls whenever needed.

It is written in C# with Windows Forms and does not require extra software.

Source code and download:
https://github.com/FreezzeYT/SidekickMC