- #define REGISTER_LICENSE {MessageBox(NULL,"You should replace the license.h file with the one youngot from 3DSTATE when this product was purchased.nDon't forget to do Rebuild All after replacing the license.h filenIf you didn't get a legal license.h file or you are having trouble thennplease contact sales@3dstate.com","Warning",MB_OK | MB_ICONWARNING);exit(0);}