Easy Window Dragging (requires XP/2k/NT)

Normally, a window can only be dragged by clicking on its title bar. This script extends that so that any point inside a window can be dragged. To activate this mode, hold down CapsLock or the middle mouse button while clicking, then drag the window to a new position.

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; Note: You can optionally release Capslock or the middle mouse button after
; pressing down the mouse button rather than holding it down the whole time.
; This script requires v1.0.25+.

~MButton & LButton::
CapsLock & LButton::
CoordMode, Mouse  ; Switch to screen/absolute coordinates.
MouseGetPos, EWD_MouseStartX, EWD_MouseStartY, EWD_MouseWin
WinGetPos, EWD_OriginalPosX, EWD_OriginalPosY,,, ahk_id %EWD_MouseWin%
WinGet, EWD_WinState, MinMax, ahk_id %EWD_MouseWin% 
if EWD_WinState = 0  ; Only if the window isn't maximized
    SetTimer, EWD_WatchMouse, 10 ; Track the mouse as the user drags it.

GetKeyState, EWD_LButtonState, LButton, P
if EWD_LButtonState = U  ; Button has been released, so drag is complete.
    SetTimer, EWD_WatchMouse, off
GetKeyState, EWD_EscapeState, Escape, P
if EWD_EscapeState = D  ; Escape has been pressed, so drag is cancelled.
    SetTimer, EWD_WatchMouse, off
    WinMove, ahk_id %EWD_MouseWin%,, %EWD_OriginalPosX%, %EWD_OriginalPosY%
; Otherwise, reposition the window to match the change in mouse coordinates
; caused by the user having dragged the mouse:
CoordMode, Mouse
MouseGetPos, EWD_MouseX, EWD_MouseY
WinGetPos, EWD_WinX, EWD_WinY,,, ahk_id %EWD_MouseWin%
SetWinDelay, -1   ; Makes the below move faster/smoother.
WinMove, ahk_id %EWD_MouseWin%,, EWD_WinX + EWD_MouseX - EWD_MouseStartX, EWD_WinY + EWD_MouseY - EWD_MouseStartY
EWD_MouseStartX := EWD_MouseX  ; Update for the next timer-call to this subroutine.
EWD_MouseStartY := EWD_MouseY