This script allows you to easily resize any window on your screen using a AHK v2 keyboard shortcut.

gistfile1.txt

^+w:: {  ; Ctrl + Shift + W
    MsgBox("Hover your mouse over the window you want to resize, then press OK.")

    ; Get the window under the mouse
    MouseGetPos(, , &winID)
    WinGetPos(&x, &y, &width, &height, "ahk_id " winID)

    MsgBox("Current Size:`nWidth: " width "`nHeight: " height)

    ; Get new width
    resultWidth := InputBox("Enter the new width:", "New Width")
    if resultWidth.Result != "OK" || resultWidth.Value = ""
        return
    newWidth := Number(resultWidth.Value)

    ; Get new height
    resultHeight := InputBox("Enter the new height:", "New Height")
    if resultHeight.Result != "OK" || resultHeight.Value = ""
        return
    newHeight := Number(resultHeight.Value)

    ; Resize window
    WinMove(x, y, newWidth, newHeight, "ahk_id " winID)
}