Returns the number of spreadsheets ExcelWriter created so far, in
a 24 hour period. Note that SpreadsheetsCreatedToday contains the
number of spreadsheets created by both ExcelApplication
and ExcelTemplate.
The hour count begins when the first spreadsheet is created. The count is reset when the first
spreadsheet is created after the previous 24 hour period. For example, if you create your first spreadsheet
at 10:00 AM on June 2, the 24 hour period will end at 10:00 AM on June 3, and the next period will begin when you
create the first spreadsheet after 10:00 AM on June 3.
SpreadsheetsCreatedToday is a Read Only property.