For browse cells, field groups, and the LAST-EVENT handle, it is readable only.
For all widgets except windows, the COLUMN attribute specifies the location, in character units, of the left edge of the widget relative to the left edge of its parent widget. In windows, the location is relative to the left edge of the display.
For browse columns, the COLUMN attribute returns the Unknown value (?) if the column is hidden.
For control-frames, the COLUMN attribute maps to the Left property of the control-frame COM object (ActiveX control container).
For the LAST-EVENT handle, the COLUMN attribute specifies the column location, in character units, of the last mouse event relative to the left edge of the current frame.
This attribute is functionally equivalent to the X attribute.