[Fix]bugs in load apex dll
[Fix]bugs in load apex dll

msincenselee/vnpy,andrewchenshx/vnpy,bigdig/vnpy,andrewchenshx/vnpy,bigdig/vnpy,msincenselee/vnpy,msincenselee/vnpy,bigdig/vnpy,andrewchenshx/vnpy,andrewchenshx/vnpy,andrewchenshx/vnpy,bigdig/vnpy,msincenselee/vnpy,vnpy/vnpy,vnpy/vnpy