Data Validation based on cell visibility

[andrewb90]

I have a simple macro that hides a few rows. When those rows are hidden, I need a way to restrict any data entry until those rows have been unhidden. I am thinking data validation, but I have no idea how I would make that work.

When rows 16:17 are hidden, I need to restrict any entry in cells D12:O15

Any ideas would be greatly appreciated.

Andrew