load spreadsheet in read-only mode

Thanks, Paulo. I had already reviewed the help topics, but I was hoping for a simpler solution I could be failing to see. Maybe you could implement this in the future, something like TdxSpreadSheet.ReadOnly that would disable any changes regardless of any sheet or cell properties.
Best regards,
Carlos

Hi, simple ReadOnly property would be good idea.

Yes, simple ReadOnly property would be good idea, but as i understand in 17.2 and 18.2 propery ReadOnly not exist:(

Let me try to explain why we did not implement this property. The point is that most of the TdxSpreadsheet control options are stored in XLS and XLSX files. However, these files do not have the ReadOnly  option. They have protection options instead. Some of our customers may want to make the ReadOnly property affect protection settings in Excel. However, others may want this property to have an effect only in our Spreadsheet. Correspondingly, each party will consider the opposite behavior a bug and ask us to fix it.
I do not think that we will be able to implement this property in the near future. Please use the solution I suggested above.

Paulo, main problem of using protection is raising exception when user try to change and raising exception in IDE in runtime. I know, what Excel is raising exception to end user when end user try to change protected area. But in my solution as developer i want only show to user some spreadsheet (as template) and enduser don't have any possibility to change template. And enduser don't want to receive exception on each attempt change something (example, press right button to show internal local menu is raised exception).

May be create property like boolean RaiseExceptionOnProtection and raise exception only if RaiseExceptionOnProtection = True, but as i see sources, exceptions about protection are raised in very deep-deep classes:(

And how to make this exception silent in Form1 and not silent in Form2? Application have global OnException handler with not default action.