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ABL Reference
Handle Attributes and Methods Reference : BOX-SELECTABLE attribute
 

BOX-SELECTABLE attribute

(Graphical interfaces only)
Indicates whether box-selection direct manipulation events for the frame or dialog box are enabled or disabled.
Data type: LOGICAL
Access: Readable/Writeable
Applies to: DIALOG-BOX widget, FRAME widget
If the BOX-SELECTABLE attribute is TRUE, then the START-BOX-SELECTION and END-BOX-SELECTION direct manipulation events are enabled for the frame or dialog box. This allows the user to select one or more widgets in the frame or dialog box by stretching a select box around the widgets. The SELECTABLE attribute must be TRUE for at least one widget in the frame or dialog box for this attribute to be effective. Otherwise, the user can stretch a select box, but without any effect on the widgets in the frame or dialog box.