Using AutoHotkey to adjust DELL monitor brightness/contrast

1. Install DELL Display Manager.
2. Commands
   Increase Brightnesss
   C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /IncControl 10 1
   Increase Contrast
   C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /IncControl 12 1
   Decrease Brightness
   C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /DecControl 10 1
   Decrease Contrast
   C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /DecControl 12 1
   We can passing multiple arguments at the same time like this
   C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /IncControl 10 1 /IncControl 12 1
3. AutoHotkey example

>^PgDn::
  Run, C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /DecControl 10 3 /DecControl 12 3
  Return

>^PgUp::
  Run, C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe /IncControl 10 3 /IncControl 12 3
  Return