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}
\membersection{wxVScrolledWindow::OnGetLineHeight}\label{wxvscrolledwindowongetlineheight}
-\constfunc{wxCoord}{OnGetLineHeight}{\param{size\_t }{n}}
+\constfunc{virtual wxCoord}{OnGetLineHeight}{\param{size\_t }{n}}
This protected virtual function must be overridden in the derived class and it
should return the height of the given line in pixels.
\membersection{wxVScrolledWindow::OnGetLinesHint}\label{wxvscrolledwindowongetlineshint}
-\constfunc{void}{OnGetLinesHint}{\param{size\_t }{lineMin}, \param{size\_t }{lineMax}}
+\constfunc{virtual void}{OnGetLinesHint}{\param{size\_t }{lineMin}, \param{size\_t }{lineMax}}
This function doesn't have to be overridden but it may be useful to do
it if calculating the lines heights is a relatively expensive operation