cell locking for range of cells

How do I get specific cells to lock with the below coding for celllocks() It shows the form and since I am going to enter a specific cell can this be done and then if a person enters in data in a wrong cell how can I clear the date cell once the active cell contents have been deleted.

Please Login or Register  to view this content.

Thank you for any help

Found the solution from a different website through a search engine

Please Login or Register  to view this content.