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ABL Reference
Handle Attributes and Methods Reference : INDEX attribute
 

INDEX attribute

The subscript value of the array element referenced by the current widget.
Data type: INTEGER
Access: Read-only
Applies to: BROWSE widget (column and cell), COMBO-BOX widget, FILL-IN widget, TEXT widget, TOGGLE-BOX widget
If the widget references a field or variable with no extents (that is, not as an array element), this attribute returns 0.