Python怎么获取不到子窗口的句柄呢，如图，求指导

Python怎么获取不到子窗口的句柄呢，如图，求指导，刚学习Python的小白吃，求指导

import win32gui
import win32con
def reset_window_pos(targetTitle): 
  hWndList = [] 
  win32gui.EnumWindows(lambda hWnd, param: param.append(hWnd), hWndList) 
  for hwnd in hWndList:
    clsname = win32gui.GetClassName(hwnd)
    title = win32gui.GetWindowText(hwnd)
    if (title.find(targetTitle) >= 0):  #调整目标窗口到坐标(600,300),大小设置为(600,600)
      win32gui.SetWindowPos(hwnd, win32con.HWND_TOPMOST, 600,300,600,600, win32con.SWP_SHOWWINDOW)
       
reset_window_pos("买入")