[問題] ctype註冊callback function

[cobrasgo (體重突破所有均線)]

小弟目前在寫程式呼叫期貨商的API
但是碰到了問題
程式如下

import ctypes
from ctypes import *
import traceback

class qyAPI:
  def __init__(self):
    self._qyDllPath = "SKOrderLib.dll"
    self._account = ""
    self._passwd = ""
    self._apiInit()

  def _apiInit(self):
    try:
      self._qyAPI = windll.LoadLibrary(self._qyDllPath)
      self._SKOrderLib_Initialize = self._qyAPI.SKOrderLib_Initialize
      self._RegisterOnOpenInterestCallBack = self._qyAPI.RegisterOnOpenInterestCallBack
      #initialization
      ret = self._SKOrderLib_Initialize(self._account, self._passwd)
      print "init result is ", ret

      CMPFUNC = CFUNCTYPE(c_int, POINTER(c_char_p))
      cb = CMPFUNC(self._oiCallback)
      #register a callback to get open interest status
      ret = self._RegisterOnOpenInterestCallBack(addressof(cb))
      print "oi result is ", ret
    except:
      traceback.print_exc()

  def _oiCallback(self, returnString):
    print "_oiCallback start"
    print returnString
    print "_oiCallback end"

qyAPI()
raw_input()

=================
其中的dll我放到
http://www.badongo.com/file/25000608
不過帳密這個就不方便po上來
所以可能在測試上面的程式時會有問題…

呼叫RegisterOnOpenInterestCallBack這個function，需要傳一個callback function
但是我這樣寫似乎是有問題的
callback function並沒有進去

請問我要register callback function的話
要怎麼寫呢？

若是有資訊不足的地方
我會再補上來
謝謝

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※ 編輯: cobrasgo        來自: 220.130.51.128       (01/24 19:10)