Release 10.1A: OpenEdge Development:
Progress 4GL Reference

HORIZONTAL attribute

The orientation of a slider, or of radio buttons in a radio set.

Data type: LOGICAL

Access: Readable/Writeable

Applies to: RADIO-SET widget, SLIDER widget

If HORIZONTAL is TRUE, the orientation is horizontal; if it is FALSE, the orientation is VERTICAL. By default, the orientation of sliders is horizontal and the orientation of radio sets is vertical.

You can set this attribute only before the widget is realized.