Ahk code

;If you use this, you have to use absolute screen coordinates.
CoordMode, Mouse, Screen

;Suppose a 100x100 px bounding box for your game inventory.
;Eg., from (500, 500) to (600, 600)
w::
{
    ;Get current Mouse coords
    MouseGetPos, xCurrent ,yCurrent

    ;Calculate future Mouse coords
    xMoved := xCurrent
    yMoved := yCurrent - 35

    ;Check if the future mouse postion will be
    ;below the top border of your bounding box,
    ;aka still inside it, after it has moved.
    ;If so, proceed and move the mouse,
    ;otherwise do nothing.
MouseGetPos, CoordXRec, CoordYRec
        MouseMove, xMoved, yMoved


if(yMoved < 503 && yMoved > 350 && yMoved > 360){
MouseMove 1846, 166
}
if(yMoved < 145){
MouseMove, %CoordXRec%, %CoordYRec%, 0
}
if(yMoved < 718 && yMoved < 720 && yMoved > 680){
MouseMove 1771, 671
}
return
}
s::
{
    ;Get current Mouse coords
    MouseGetPos, xCurrent ,yCurrent

    ;Calculate future Mouse coords
    xMoved := xCurrent
    yMoved := yCurrent +35

    ;Check if the future mouse postion will be
    ;below the top border of your bounding box,
    ;aka still inside it, after it has moved.
    ;If so, proceed and move the mouse,
    ;otherwise do nothing.

        MouseMove, xMoved, yMoved

if(yMoved > 285 && yMoved < 360){
MouseMove 1773, 526
}
if(yMoved > 697 && yMoved < 715){
MouseMove 1772, 736
}
return
}
a::
{
    ;Get current Mouse coords
    MouseGetPos, xCurrent ,yCurrent

    ;Calculate future Mouse coords
    xMoved := xCurrent -40
    yMoved := yCurrent

    ;Check if the future mouse postion will be
    ;below the top border of your bounding box,
    ;aka still inside it, after it has moved.
    ;If so, proceed and move the mouse,
    ;otherwise do nothing.
    if (xMoved > 1740) {
        MouseMove, xMoved, yMoved
    }
return
}
d::
{
    ;Get current Mouse coords
    MouseGetPos, xCurrent ,yCurrent

    ;Calculate future Mouse coords
    xMoved := xCurrent +40
    yMoved := yCurrent

    ;Check if the future mouse postion will be
    ;below the top border of your bounding box,
    ;aka still inside it, after it has moved.
    ;If so, proceed and move the mouse,
    ;otherwise do nothing.
    if (xMoved < 1917) {
        MouseMove, xMoved, yMoved
    }
return
}