help-button

Arguments: basic-pane

Returns whether basic-pane has a "question mark" button in its title-bar for invoking context-sensitive help. If the user clicks this button and then clicks a dialog-item or child window of basic-pane, then the generic function context-sensitive-help is called. An application can add methods to context-sensitive-help to display help on the clicked dialog-item or child window.

Microsoft Windows note: due to operating system design, this button may not be used along with the minimize or maximize buttons (see minimize-button and maximize-button). Those buttons will not appear if specified along with the help-button option.

GTK note: A help button will never appear on a top-level window, because X window managers do not provide such a thing.

This property should be specified by passing a help-button initarg to make-window, since this property cannot be changed on an existing window by calling setf and this generic function. (You may also specify it interactively in the inspector for a form window; the button will not appear on the form itself but will appear on the running window of the form.)

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Created 2012.5.30.