An AutoHotKey file for resizing windows with behavior similar to OSX

windowResizer.ahk

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn  ; Enable warnings to assist with detecting common errors.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir%  ; Ensures a consistent starting directory.

I_Icon = C:\Program Files\AutoHotkey\Script Icons\resize.ico
ICON [I_Icon]                        ;Changes a compiled script's icon (.exe)
if I_Icon <>
IfExist, %I_Icon%
	Menu, Tray, Icon, %I_Icon%   ;Changes menu tray icon

; Get maximised window size
sysget, SM_CXFULLSCREEN, 16
sysget, SM_CYFULLSCREEN, 17

; Get border and frame stuff
sysget, SM_CXEDGE, 45
sysget, SM_CYEDGE, 46
sysget, SM_CXBORDER, 5
sysget, SM_CYBORDER, 6
sysget, SM_CXSIZEFRAME, 32
sysget, SM_CYSIZEFRAME, 33

; Rename Variables to shorter versions
frameX := (SM_CXSIZEFRAME)
frameY := (SM_CYSIZEFRAME)
width := (SM_CXFULLSCREEN)
height := (SM_CYFULLSCREEN + 40)
return

; Maximize window
^#!Up::
WinGetPos, X, Y, W, H, A
resizeWindow(0-frameX, 0-frameY, (width), (height))
return

; Maximize width
^#!w::
WinGetPos, X, Y, W, H, A
resizeWindow(0-frameX, (Y), (width), (H))
return

; Maximize height
^#!h::
WinGetPos, X, Y, W, H, A
resizeWindow((X), 0, (W), (height-frameY))
return

; Half height Top
^#Up::
WinGetPos, X, Y, W, H, A
resizeWindow((X), 0, (W), (height/2))
return

; Half height Down
^#Down::
WinGetPos, X, Y, W, H, A
resizeWindow((X), (0+height/2), (W), (height/2-frameY))
return

; Left 1/3 of the screen
^#Left::
WinGetPos, X, Y, W, H, A
resizeWindow(0, 0, (width*0.33), (height-frameY))
return

; Left 2/3 of the screen
^#!Left::
WinGetPos, X, Y, W, H, A
resizeWindow(0, 0, (width*0.66), (height-frameY))
return

; Right 1/3 of the screen
^#Right::
WinGetPos, X, Y, W, H, A
resizeWindow((0+width*0.66), 0, (width*0.33+2*frameX), (height-frameY))
return

; Right 2/3 of the screen
^#!Right::
WinGetPos, X, Y, W, H, A
resizeWindow((0+width*0.33), 0, (width*0.66+2*frameX), (height-frameY))
return

; restore original size
^#z::
resizeWindow((X), (Y), (W), (H))
return

resizeWindow(xCord, yCord, width, height) 
{
    WinGetClass, class, A
    WinMove, ahk_class %class%, , xCord, yCord, width, height
}