Class Libraries & REST APIs for the developers to Manipulate & process Files froM Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforMs....from the source Excel file Dim m_workbook As Workbook = New Workbook...first worksheet Dim m_worksheet As Worksheet = m_workbook . Worksheets...