Hello, today during compiling windows agent version 3.0.11 on Windows 10 Pro x64, using VS2015 I found, that file Makefile_sender_dll contains bad file path to zabbix_sender.o.

Problem line:
..\..\..\src\zabbix_sender\win32\zabbix_sender.o

If i removed win32 subdirectory from path, compilation of agent on windows was sucessfull:
..\..\..\src\zabbix_sender\zabbix_sender.o

Bug appeared during compilation with TLS support, Makefile use old file src/zabbix_sender/win32/zabbix_sender.c during compilation and because it is old and don't contain support for TLS, compilation failed.

Please fix Makefile_sender_dll to include correct file.