The SSH library
On UNIX and Windows systems its the same, you need at least the libssh.h header file and the libssh shared library.
On UNIX systems linking against the static version of the library is the same as linking against the shared library. Both have the same name. Some build system require to use the full path to the static library.
To be able to compile the application you're developing you need to either pass LIBSSH_STATIC as a define in the compiler command line or define it before you include libssh.h. This is required cause the dynamic library needs to specify the dllimport attribute.
If you're are statically linking with OpenSSL, read the "Linking your application" section in the NOTES.[OS] in the OpenSSL source tree!