This article provides sample code to set page options of Excel worksheets prograMmatically using C# API and .NET Library. You will be able to set Page Orientation, Scaling Factor, FitToPages Options, Paper Size, Print Quality, First Page Number....PaperA3 A3 (297 mm x 420 mm) PaperA4 A4 (210 mm x 297 mm) PaperA4Small...Small (210 mm x 297 mm) PaperA5 A5 (148 mm x 210 mm) PaperB4 JIS...