Automatically toggle on or off with Steam games

[erbkaiser]

Using Steam's launch options for a game, it is possible to turn HDR off when the game starts, and on again when it exists (or vice versa). Especially handy for games that trigger a bug in Windows HDR where the entire desktop is dimmed or partially dimmed after exiting.

Assuming HDRCmd.exe 'lives' in C:\Tools, the following command can be used:
cmd /c start "" "C:\Tools\HDRCmd.exe" off & %command% & cmd /c start "" "C:\Tools\HDRCmd.exe" on
Edit "C:\Tools\HDRCmd.exe" if it can be found in another location.

%command% is what will be used to actually launch the Steam game or program. Launching HDRCmd.exe through a command prompt window before and after the game means it will always run with the desired option, unless the game crashes and cannot normally exit.

[res2k]

Personally I use AutoActions (https://github.com/Codectory/AutoActions) to automatically toggle HDR when playing specific games, works well for me.

(On a more general note, it's usually a good idea to not clutter up C:\Windows with things not from the OS or drivers...
So I recommend storing HDRTray/HDRCmd somewhere else.)

[erbkaiser]

I prefer not to use yet another program, so using the built-in Steam launch options does the trick.
And yeah, point on the location. I just don't like dealing with the stupid space in 'Program Files' (or x86) but I might move it to C:\Tools or something.