# Validation Controls

Learn how you can prevent entering invalid characters in a cell by using a validation control in the Spread cell.

## Content



You can prevent a user from entering invalid characters in a cell by using a validation control in the Spread cell.

For more information, refer to [Using Validation Controls](/spreadnet/docs/latest/online-asp/overview/spweb-devguide/spweb-setCellTypes/spweb-imvalid).