[CONNECT Update 16 C++] DgnLink Handlers

The MicroStationAPI documentation is silent on the process used to create a DgnLink.  Example ..\SDK\examples\Miscellaneous\validateSheetLinks shows how to read DgnLInks, but not how to create, edit or delete one.

I suspect that the answer lies in the DgnLinkhandlers.  Several are mentioned in header file DgnLinks.h...

struct DgnFileLinkHandler;
struct DgnModelLinkHandler;
struct DgnRegionLinkHandler;
struct DgnFolderLinkHandler;
struct DgnGenericLinkHandler;
struct DgnURLLinkHandler;
struct DgnConfigVarExpressionLinkHandler;
struct DgnLinkSetLinkHandler;
struct WordBookmarkLinkHandler;
struct WordHeadingLinkHandler;
struct ExcelSheetLinkHandler;
struct PDFRegionLinkHandler;
struct DgnLinkUserDataHandler;

But nothing more: no help, no class definition, no example.