python3.8 load dll OSError: [WinError 127] The specified procedure could not be found

env: windows10-64, python3.8.8,

CALL relation is -->

1. in file jgtrade_api_func_def.py

    #!/usr/bin/env python
    #  coding:utf-8
    from ctypes import *

    
    jgtradeapi = windll.LoadLibrary('lib/td/JGTradeApi.dll')

2. in file td_api.py

    # -*- coding:utf-8 -*-
    from jg_api.jgtrade_api import *
    ###

• in main.py

    from jg_api.td_api import JGTradeApi

• When I run td_api.py, it works well

• When I run main.py, FileNotFoundError

  File "D:\work\WCJGClient\jg_api\jgtrade_api_func_def.py", line 14, in jgtradeapi = windll.LoadLibrary('lib/td/JGTradeApi.dll') File "D:\ProgramData\Anaconda3\lib\ctypes_init_.py", line 459, in LoadLibrary return self.dlltype(name) File "D:\ProgramData\Anaconda3\lib\ctypes_init.py", line 381, in init self._handle = _dlopen(self._name, mode) FileNotFoundError: Could not find module 'D:\work\WCJGClient\lib\td\JGTradeApi.dll' (or one of its dependencies). Try using the full path with constructor syntax.

• Then I change path as windll.LoadLibrary('jg_api/lib/td/JGTradeApi.dll'), the error changed

  File "D:\work\WCJGClient\jg_api\jgtrade_api_func_def.py", line 14, in jgtradeapi = windll.LoadLibrary('jg_api/lib/td/JGTradeApi.dll') File "D:\ProgramData\Anaconda3\lib\ctypes_init_.py", line 459, in LoadLibrary return self.dlltype(name) File "D:\ProgramData\Anaconda3\lib\ctypes_init.py", line 381, in init self._handle = _dlopen(self._name, mode) OSError: [WinError 127] The specified procedure could not be found.

• I also tried to use an absolute path, but reported the same error, Has anyone ever had such a problem?