Keep a transparent window on top and remove titlebar

transparent-ontop-titlebar.ahk

#SingleInstance Force

;;;
; Toggle on top + titlebar + transparency of window under mouse.
#j:: {
    ; WS_THICKFRAME (WS_BORDER + WS_DLGFRAME + WS_SIZEBOX)
    WS_THICKFRAME := "0xC40000"

    ; Active mouse window
    MouseGetPos(,, &ActiveWindow)

    ; Toggle the frame
    WinSetStyle("^" WS_THICKFRAME, ActiveWindow)

    ; Avoid split state
    state := WinGetStyle(ActiveWindow) & WS_THICKFRAME

    ; Toggle transparency (invisible [0 - 255] visible)
    transperancy := (state) ? 255 : 100

    WinSetTransparent(transperancy, ActiveWindow)

    ;; Setting the transparency level to 255 before using "Off" might avoid window
    ;; redrawing problems such as a black background.
    if (transperancy == 255) {
        WinSetTransparent("Off", ActiveWindow)
    }

    ; Toggle on top
    WinSetAlwaysOnTop((state) ? 0 : 1, ActiveWindow)
}