InputNotebook

InputNotebook[ ] gives the current notebook into which keyboard input in the front end will be directed.

InputNotebook returns a NotebookObject.

If there is no current input notebook, InputNotebook[ ] will return $Failed.

The current input notebook is the notebook to which textual commands in the front end are normally directed.

A palette window can be a currently selected notebook but cannot normally be an input notebook.

See The Mathematica Book: Section 2.10.3.

See also: Notebooks, SelectedNotebook, EvaluationNotebook, ButtonNotebook.