In excel, if you set word wrap to cell content, make the column wider and then autofit the column in which it is, the content will fit to a reasonable width, as seen in the image below.

When doing the same in SpreadProcessing, the result is always a narrow column:

            CellSelection cellSelection = sheet.Cells[0, 0];
            cellSelection.SetIsWrapped(true);

            ColumnSelection columnSelection = sheet.Columns[0];
            columnSelection.SetWidth(new ColumnWidth(100, true));
            columnSelection.AutoFitWidth();

Result:

Here are the same steps performed in WPF RadSpreadsheet, which uses RadSpreadProcessing for its engine: