python 操作windows窗口

import win32con, win32gui

#返回子容器类
def get_clasname(hwnd):
    clasname = win32gui.GetClassName(hwnd)

    return clasname

def callback(hwnd, controls):
    controls.append(hwnd)

hwnd = win32gui.FindWindow(None, "输入高程点数据文件名") # 根据主窗口标题获取句柄

controls = []
win32gui.EnumChildWindows(hwnd, callback, controls) #查找当前窗口内所有句柄

tid = win32gui.FindWindowEx(hwnd, None, "ComboBoxEx32", None) #查找文本编辑窗口句柄

win32gui.SendMessage(tid, win32con.WM_SETTEXT, None, "6-28.dat") #发送文本
button1 = win32gui.FindWindowEx(hwnd, None, "button", None) #查找按钮句柄

win32gui.PostMessage(button1, win32con.WM_KEYDOWN, win32con.VK_RETURN, 0) #回车
# win32gui.PostMessage(button1, win32con.WM_KEYUP, win32con.VK_RETURN, 0)

#循环主窗口内所有子容器句柄
# for control in controls:
#    get_clasname(control)