; Variables Increments := 10 ; < lower for a more granular change, higher for larger jump in brightness 
CurrentBrightness := GetCurrentBrightNess() 
; Hot Keys 
; Win + Numpad 4/5/6 

#Numpad4:: ChangeBrightness( CurrentBrightness -= Increments ) ; decrease brightness 
#Numpad5:: ChangeBrightness( CurrentBrightness := 50 ) ; default 
#Numpad6:: ChangeBrightness( CurrentBrightness += Increments ) ; increase brightness ; Functions 

ChangeBrightness( ByRef brightness := 50, timeout = 1 ) { 
  if ( brightness >= 0 && brightness <= 100 ) { 
    For property in ComObjGet( "winmgmts:\\.\root\WMI" ).ExecQuery( "SELECT * FROM WmiMonitorBrightnessMethods" ) property.WmiSetBrightness( timeout, brightness )    
  } 
  else if ( brightness > 100 ) { brightness := 100 } 
  else if ( brightness < 0 ) { brightness := 0 } 
} GetCurrentBrightNess() { 
  For property in ComObjGet( "winmgmts:\\.\root\WMI" ).ExecQuery( "SELECT * FROM WmiMonitorBrightness" ) 
    currentBrightness := property.CurrentBrightness 
    return currentBrightness
    }