Returns the index of the first line after the currently visible one. If the
return value is $0$ it means that no lines are currently shown (which only
happens if the control is empty). Note that the index returned by this method
-is not always a valid index as it may be equal to \helpref{GetLineCount}{wxvscrolledwindowsetlinecount}.
+is not always a valid index as it may be equal to \helpref{GetLineCount}{wxvscrolledwindowgetlinecount}.
\wxheading{See also}