| xpMsg_ScrollBarSliderPositionChanged | "1500" | The scroll bar sends this message when the slider position changes. It sends the message up the call chain; param1 is the scroll bar widget ID. |
| xpMsg_ScrollBarSliderPositionChanged | "1500" | The scroll bar sends this message when the slider position changes. It sends the message up the call chain; param1 is the scroll bar widget ID. |