Occurs when the user clicks in the open space above the scroll box (also called the thumb).
Event ID |
Objects |
|---|---|
pbm_sbnpageup |
VScrollBar, VTrackBar |
None
Long. Return code choices (specify in a RETURN statement):
0 Continue processing
When the user clicks in a vertical scroll bar, nothing happens unless you have scripts that change the scroll bar’s Position property:
For the scroll bar arrows, use the LineUp and LineDown events.
For clicks in the scroll bar background above and below the thumb, use the PageUp and PageDown events.
For dragging the thumb itself, use the Moved event.
Example 1 This code in the PageUp event causes the thumb to move up when the user clicks on the up arrow of the vertical scroll bar (the page size is stored in the instance variable ii_pagesize):
IF This.Position < &
This.MinPosition + ii_pagesize THEN
This.Position = MinPosition
ELSE
This.Position = This.Position - ii_pagesize
END IF
Example 2 This example changes the position of the scroll box by a predetermined page size stored in the instance variable ii_pagesize and scrolls backwards through a DataWindow control 10 rows for each page:
long ll_currow, ll_prevrow
This.Position = This.Position - ii_pagesize
ll_currow = dw_1.GetRow( )
ll_prevrow = ll_currow - 10
dw_1.ScrollToRow(ll_prevrow)
dw_1.SetRow(ll_prevrow)
