I have an input sheet which received the data from someone else.

All the columns have some restriction, such as one date field must be
greater than another date field, etc.

I need to check the data integrity based on the data rules I have for
each column. If the data is not satisfied, it will pop up some warning
messages, or highlight the cells.

Are there any sample codes that I can borrow?

Appreciate your help greatly,


Ron