23.04.2015, 09:47
Usually I add my sdk dir to the include directories of my project. Project properties > C/C++ > General > Additional Include Directories. Then you can include them like #include <amx/amx.h>
About the errors in your .def file: RMB on the file in the solution explorer > Properties > General. Make sure Item Type is set to "Does not participate in build".
About the errors in your .def file: RMB on the file in the solution explorer > Properties > General. Make sure Item Type is set to "Does not participate in build".