AutoHotkey script to map the windows key to the function like a laptop keyboard's Fn key to have Fn+arrow keys act as home, end, page up and page down keys.

HomeEnd.ahk

;
; Home
;

; Win-Left = Home = start of line
#Left::Send {Home}

; Ctrl-Win-Left = Ctrl-Home = start of document
^#Left::Send {LCtrl down}{Home}{LCtrl up}

; Shift-Win-Left = Shift-Home = select to start of line
+#Left::Send {LShift down}{Home}{LShift up}

; Ctrl-Shift-Win-Left = Ctrl-Shift-Home = select to start of document
^+#Left::Send {LCtrl down}{LShift down}{Home}{LShift up}{LCtrl up}


;
; End
;

; Win-Right = End = end of line
#Right::Send {End}

; Ctrl-Win-Right = Ctrl-End = end of document
^#Right::Send {LCtrl down}{End}{LCtrl up}

; Shift-Win-Right = Shift-End = select to end of line
+#Right::Send {LShift down}{End}{LShift up}

; Ctrl-Shift-Win-Right = Ctrl-Shift-End = select to start of document
^+#Right::Send {LCtrl down}{LShift down}{End}{LShift up}{LCtrl up}


;
; Restore Window Snapping
;

; Alt-Win-Left = Win-Left
!#Left::Send {LWin down}{Left}{LWin up}

; Alt-Win-Right = Win-Right
!#Right::Send {LWin down}{Right}{LWin up}

; Alt-Win-Up = Win-Up
!#Up::Send {LWin down}{Up}{LWin up}

; Alt-Win-Down = Win-Down
!#Down::Send {LWin down}{Down}{LWin up}