API support to build cross-platform applications having the ability to generate, modify, convert, render, and print spreadsheets. It allows developers to manage worksheets, rows, columns & cells, create spreadsheet contents and styles from scratch, import data onto the worksheets from different data sources, add common and complex mathematical, financial, and text formulas, create & manipulate pivot tables, charts, hyperlinks, comments, drawing objects and much more....string values within cells, assigning values to a range of cells...