This function will return the next Annotation of the iteration started
with a call to tip_GetFirstAnnotation, or of the Annotation returned by
a previous call to tip_GetNextAnnotation. If no more Annotations of the
same type (which was specified through a call to tip_GetFirstAnnotation)
exist in the specified Document, an error message will be prompted.
Return Value:
This function returns an Annotation object (of type CDM_Annotation) if
an Annotation having as type the value specified by a prevous call to
tip_GetFirstAnnotation exists in the specified Document.
In case that such an Annotation does not exist, An error message will be prmpted.
If that happens, this function cannot be called unless
tip_GetFirstDocument is called again, in order to initialise a new
iteration over Annotations of a specific type.