This sample demonstrates how to Lock and Unlock spreadsheets using XlsIO.
Microsoft Excel offers a special way for protecting specific data and certain worksheets with or without a password. This prevents anyone from changing, moving, or deleting important data.
Excel allows you to edit or lock a range of cells in a protected worksheet by using the Protection tab in the Format Cells dialog. By default, all cells are locked, but they are not hidden when the worksheet is protected. Worksheets can be protected by choosing the Tools - Protection - Protect Sheet option in Excel.