This attribute specifies the virtual client area origin relative to the upper left of the displayed area in increments of "SCROLL HEIGHT UNITS." The maximum offset equals
(actual client height-virtual client height)-OR- 0
whichever is less ("actual client height" is determinable with the INSIDE HEIGHT attribute). If the panel is resized, either programmatically or by the operator, so that SCROLL Y ORIGIN exceeds the maximum offset, SCROLL Y ORIGIN will be changed to maximum offset.
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