在win32上使用python和ctypes获取列表框内容时出现问题

在win32上使用python和ctypes获取列表框内容时出现问题,python,winapi,ctypes,Python,Winapi,Ctypes,多亏了python和ctypes,我想获得列表框的内容 item_count = ctypes.windll.user32.SendMessageA(hwnd, win32con.LB_GETCOUNT, 0, 0) items = [] for i in xrange(item_count): text_len = ctypes.windll.user32.SendMessageA(hwnd, win32con.LB_GETTEXTLEN, i, 0) buffer = cty

多亏了python和ctypes,我想获得列表框的内容

item_count = ctypes.windll.user32.SendMessageA(hwnd, win32con.LB_GETCOUNT, 0, 0)
items = []
for i in xrange(item_count):
    text_len = ctypes.windll.user32.SendMessageA(hwnd, win32con.LB_GETTEXTLEN, i, 0)
    buffer = ctypes.create_string_buffer("", text_len+1)
    ctypes.windll.user32.SendMessageA(hwnd, win32con.LB_GETTEXT, i, buffer)
    items.append(buffer.value)
print items
项目数量正确,但文本错误。所有文本长度均为4,文本值类似于“0\xd9\xee\x02\x90”

我曾尝试使用unicode缓冲区,结果类似


我没有发现我的错误。有什么想法吗

看起来您需要使用压缩结构来获得结果。我在网上找到了一个例子,也许这会对您有所帮助:


如果所述列表框由业主绘制,则文件中的这一段可能与以下内容相关:

如果创建具有所有者绘制样式但没有LBS_HASSTRINGS样式的列表框,则lParam参数指向的缓冲区将接收与项(项数据)关联的值


您收到的四个字节看起来可能是指针,这是存储在每项数据中的典型值。

我认为您是对的。它是一个所有者绘制的列表框。我不知道数据结构是什么,因此无法获取文本:-(
# Programmer : Simon Brunning - simon@brunningonline.net
# Date       : 25 June 2003
def _getMultipleWindowValues(hwnd, getCountMessage, getValueMessage):
    '''A common pattern in the Win32 API is that in order to retrieve a
    series of values, you use one message to get a count of available
    items, and another to retrieve them. This internal utility function
    performs the common processing for this pattern.

    Arguments:
    hwnd                Window handle for the window for which items should be
                        retrieved.
    getCountMessage     Item count message.
    getValueMessage     Value retrieval message.

    Returns:            Retrieved items.'''
    result = []

    VALUE_LENGTH = 256
    bufferlength_int  = struct.pack('i', VALUE_LENGTH) # This is a C style int.

    valuecount = win32gui.SendMessage(hwnd, getCountMessage, 0, 0)
    for itemIndex in range(valuecount):
        valuebuffer = array.array('c',
                                  bufferlength_int +
                                  " " * (VALUE_LENGTH - len(bufferlength_int)))
        valueLength = win32gui.SendMessage(hwnd,
                                           getValueMessage,
                                           itemIndex,
                                           valuebuffer)
        result.append(valuebuffer.tostring()[:valueLength])
    return result

def getListboxItems(hwnd):
    '''Returns the items in a list box control.

    Arguments:
    hwnd            Window handle for the list box.

    Returns:        List box items.

    Usage example:  TODO
    '''

    return _getMultipleWindowValues(hwnd,
                                     getCountMessage=win32con.LB_GETCOUNT,
                                     getValueMessage=win32con.LB_GETTEXT)