I created this solely because the excellent EventGhost automation tool is only able to adjust speaker volume by default due to Windows API limitations and their aim to be Windows 2000/XP compatible. This is a little annoying if you regularly use a remote control and headphones, whose volume you'd be unable to adjust using the remote.

Should work on Windows Vista and newer, tested on Windows 7 and Windows 10. You need to have a recent version of Visual C++ libraries installed (Visual Studio 2015 or newer) but chances are if you have any software on your PC, these libraries will have already been installed by other programs.

• SetVolume or SetVolume help displays usage information.
• SetVolume get reports current default playback device volume as a percentage.
• SetVolume set <percent> sets current default playback device volume to a percentage.
• SetVolume set +<percent> increases default playback device volume by a specified percentage.
• SetVolume set -<percent> decreases default playback device volume by a specified percentage.
• SetVolume mute mutes default playback device.
• SetVolume unmute unmutes default playback device.
• SetVolume togglemute toggles mute for default playback device.

1. Install Microsoft Visual Studio 2015
2. Get the source.
3. Open solution – you should be prompted to install Windows 8.1 SDK if you have not done so yet. (Do not worry, the 8.1 SDK is backwards compatible down to Vista.)
4. Build!

Based on and inspired by code shared by Larry Osterman of Microsoft.