Write an Initialization Function

In the initialization function for the shared library that defines the new tag, register the tag using the function shtml_add_tag. The signature is:

NSAPI_PUBLIC int shtml_add_tag (
   const char* tag,
   ShtmlTagInstanceLoad ctor,
   ShtmlTagInstanceUnload dtor,
   ShtmlTagExecuteFunc execFn,
   ShtmlTagPageLoadFunc pageLoadFn,
   ShtmlTagPageUnLoadFunc pageUnLoadFn);

Any of these arguments can return NULL except for the tag and execFn.