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ABL Reference
Handle Attributes and Methods Reference : EDIT-CAN-UNDO attribute
 

EDIT-CAN-UNDO attribute

(Windows only; Graphical interfaces only)
Indicates whether the widget can undo the last modification.
Data type: LOGICAL
Access: Read-only
Applies to: BROWSE widget (cell), COMBO-BOX widget, EDITOR widget
If the widget can undo the last modification, EDIT-CAN-UNDO has the value TRUE, otherwise it has the value FALSE.
If you set EDIT-CAN-UNDO to any value, the AVM empties the undo buffer.
For browses, this attribute applies only to fill-in and combo-box browse columns.