I change the syntax, comment the poll-loop out and i copy the new version over the old files on the same place.

I got:
anet_callback: function not found
anet_reset_queue: function not found
anet_set_compatibility: function not found
anet_set_encryption: function not found
anet_set_warning: function not found
enet_abort_fsending: function not found
enet_check_client: function not found
enet_clsend_event: function not found
enet_clsend_file: function not found

and so on...

Now, i copied the dll and the .h successive in my workdir. First i think he cant find anet.h but he does. Now i change the dll to the old and i have only the new parts in my log like

...
anet_reset_queue: function not found
anet_set_compatibility: function not found
anet_set_encryption: function not found
anet_set_warning: function not found
enet_abort_fsending: function not found
enet_clsend_file: function not found
enet_get_fprogress: function not found
enet_get_fsent: function not found
enet_get_fsize: function not found
...

I download the demo from your website... The same? I give up!