我的python tkinter滚动条没有什么可单击并滚动的

Question

我正在尝试向此列表框小部件添加滚动条，但是尽管出现了画布，但其中没有任何可交互的对象。这是屏幕截图：

我的代码如下：

def readMessage(userhash):
    def readMsgs(message):
        readWin = Tk()

        msg = Message(readWin, width=200, text=message).grid(padx=5, pady=5)
        endBtn = Button(readWin, text='Close', command=lambda: readWin.state("withdrawn")).grid(padx=5, pady=5)

    readMsgsWin = Tk()

    scrollbar = ttk.Scrollbar(readMsgsWin)
    scrollbar.grid(row=1, column=2, sticky='ns')

    msgListbox = Listbox(readMsgsWin, width=35, yscrollcommand=scrollbar.set)
    msgsDict = literal_eval(sendStr(str(['findMsgs', str(userhash)]), 5000))
    scrollbar.config(command=msgListbox.yview)

    print (msgsDict, type(msgsDict))
    for key, message in msgsDict.items():
        msgsDict[key] = decrypt(message)
        msgListbox.insert(END, key)

    readBtn = Button(readMsgsWin, text='Read', command=lambda: readMsgs(msgsDict[msgListbox.get(msgListbox.curselection())]))
    closeBtn = Button(readMsgsWin, text='Close', command=lambda: readMsgsWin.state("withdrawn"))

    msgListbox.grid(row=1, column=1, padx=5, pady=5)
    readBtn.grid(row=2, column=1, padx=5, pady=5)
    closeBtn.grid(row=2, column=2, padx=5, pady=5)

请帮助，尝试了许多网站示例后，我的想法已经用尽，将它们集成到程序中后，这些示例都没有用。我以前从未尝试过在tkinter中实现滚动条。