// a sizer might override this manual scrollbar setting in old code.
// m_targetWindow->SetVirtualSizeHints( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
- m_targetWindow->SetVirtualSize( noUnitsX * pixelsPerUnitX, noUnitsY * pixelsPerUnitY );
+ int w = noUnitsX * pixelsPerUnitX;
+ int h = noUnitsY * pixelsPerUnitY;
+ m_targetWindow->SetVirtualSize( w ? w : wxDefaultCoord,
+ h ? h : wxDefaultCoord);
if (!noRefresh)
{