mpVScrollbar->SetPosSizePixel(aWidth,0,aScrollbarWidth,aHeight);
mpVScrollbar->SetVisibleSize( aHeight );
mpVScrollbar->SetPageSize(  aHeight * 8 / 10 );
mpVScrollbar->SetLineSize( mpOutliner->GetTextHeight() / 10 );	
mpVScrollbar->SetThumbPos(mpOutlinerView->GetVisArea().Top());
mpVScrollbar->SetRange( Range(0, mpOutliner->GetTextHeight()-1) );