WidgetGroup[{content, ...}] specifies custom layout settings for how the content widgets are displayed.

Widget["PopupMenu"] represents a popup menu.

Here is an implementation of the J/Link RealTimePlotting example written with the GUIKit` package.

CellInformation[obj] gives information about selected cells in the notebook represented by the notebook object obj.

Mathematica provides a uniquely powerful interactive environment for building up arbitrarily complex computations, under convenient interactive or programmatic control.

Integrated into the core Mathematica language is industrial-strength string manipulation, not only with ordinary regular expressions, but also with Mathematica's own powerful ...

CellDingbat is an option for Cell which specifies what dingbat to use to emphasize a cell.

FrontEndExecute[expr] sends expr to be executed by the Mathematica front end.

Notebook[{cell_1, cell_2, ...}] is the low-level construct that represents a notebook manipulated by the Mathematica front end.

ShowCursorTracker is an option for Cell that specifies whether an elliptical spot should appear momentarily to guide the eye if the cursor position jumps.