actually, in making the dummy macro,
#define NEWTON_API DLLEXPORT
I found it where it is defined by the editor. this file.,
C:\unrealProjects\seminar_01\Plugins\newton\Intermediate\Build\Win64\x64\UnrealEditor\Development\newton\Definitions.newton.h
the problem is that Visual studio does not find it, because it is not part of the project test,
it is part of the plugin. chnge the search path does find it. anyone that one problem solved.