Build 4.5.0.69 of xlsgen improves the page order algorithm in print/preview/PDF/XPS scenarios.

Prior to this build, pages would be rendered by xlsgen in a top-down then left-right algorithm with no API available to change that.

The page setup object has a new property, PageNumberLeftToRight, which when set to TRUE does the opposite, i.e. pages are rendered in a left-right then top-down algorithm.