({{, (RefLink[BoxObject, paclet:ref/BoxObject])[id] 
is an object that represents a box structure in an open notebook in the front end.}})

OpenersNotesSection(Spacer1)Details

(RefLink[BoxObject, paclet:ref/BoxObject]) expressions are typically generated using (RefLink[EvaluationBox, paclet:ref/EvaluationBox]).

id is an integer that gives a serial number for the box structure that is unique to this front end session.

Clicking the (RefLink[StandardForm, paclet:ref/StandardForm]) output of a (RefLink[BoxObject, paclet:ref/BoxObject]) will act as a hyperlink that targets that box structure.

Some notebook manipulation functions, such as (RefLink[NotebookRead, paclet:ref/NotebookRead]) and (RefLink[NotebookDelete, paclet:ref/NotebookDelete]), which operate on a notebook's current selection, also support forms using (RefLink[BoxObject, paclet:ref/BoxObject]).

Any function that takes a (RefLink[NotebookSelection, paclet:ref/NotebookSelection]) can also take a (RefLink[BoxObject, paclet:ref/BoxObject]).

If the box structure targeted by (RefLink[BoxObject, paclet:ref/BoxObject]) is deleted or if its container notebook is closed, the (RefLink[BoxObject, paclet:ref/BoxObject]) will no longer be valid for use. Functions that attempt to use it will generally return (RefLink[$Failed, paclet:ref/$Failed]).

A (RefLink[BoxObject, paclet:ref/BoxObject]) is permanently invalid after a notebook is closed or the box structure is deleted, even if that notebook is reopened or the box structure is pasted into the notebook again. Any changes that only affect the contents of the box structure without deleting the box structure entirely will leave the (RefLink[BoxObject, paclet:ref/BoxObject]) intact.

OpenersPrimaryExamplesSection(Spacer1)Examples  (1)

OpenersExampleSection0(Spacer1)Basic Examples  (1)

Display the (RefLink[BoxObject, paclet:ref/BoxObject]) for a given (RefLink[Dynamic, paclet:ref/Dynamic]) display:

Dynamic[EvaluationBox[]]

({{DocumentationFooterIconsRelatedFunction.png, ({{See Also}, {(RefLink[EvaluationBox, paclet:ref/EvaluationBox])  ▪  (RefLink[ParentBox, paclet:ref/ParentBox])  ▪  (RefLink[CellObject, paclet:ref/CellObject])  ▪  (RefLink[NotebookObject, paclet:ref/NotebookObject])}})}})

({{DocumentationFooterIconsRelatedGuide.png, ({{Related Guides}, {▪(RefLinkPlain[Low-Level Notebook Programming, paclet:guide/LowLevelNotebookProgramming])}})}})