Hi faffo
After running any macro the undo feature is gone until you do some other
manual changes in the sheet (just as it is when you Save or Autosave runs.

Hope this helps
Regards, Brett

"faffo1980" wrote:

Hi all,
I'm developing a c# excel addin and in order to make it work I have added a
new handler for the SheetChange event.
This handler modifies some global (addin scope) variables in order to
determine if some row/columns have been deleted and uses the UsedRange
attribute.
After that it become impossible to UNDO the modification.

Could anyone help finding out the reason and fixing it?

Thanks a lot for the help,

faffo1980