例子
win_first=win32gui.FindWindow("#32770","打开")
win_second=win32gui.FindWindowEx(win_first,0,"ComboBoxEx32",None)
win_third=win32gui.FindWindowEx(win_second,0,"ComboBox",None)
edit=win32gui.FindWindowEx(win_third,0,'Edit',None)
button=win32gui.FindWindowEx(win_first,0,'Button','打开(&O)')
win32gui.SendMessage(edit,win32con.WM_SETTEXT,None,r"C:\Users\Administrator\Desktop\datafile.txt")
win32gui.SendMessage(win_first,win32con.WM_COMMAND,1,button)