Following the compilation instructions for building a WIndows Agent, compilation fails when creating a statically linked openssl build when linking as the makefile_agent, makefile_get and makefile_sender files do not include crypt32.lib. To fix I had to manually add this library on the LIBS= line in the makefiles.{}

Either add in the instructions to do this manually on https://www.zabbix.com/documentation/current/en/manual/installation/install/win_agent or have steps to have configure to generate the makefiles and add this library if "no-shared" is to be selected.