G.18. ErrorProvider

The ErrorProvider component indicates to the user that another control has an error associated with it. ErrorProvider is an extender provider, so it adds a new Error property to the other controls on its form. For example, if the ErrorProvider is named ErrorProvider1, each control on the form gets a new property named "Error on ErrorProvider1." At design time, use the Properties window to set or clear this value.

To associate an error with a control at runtime, use the ErrorProvider's SetError method. The ErrorProvider automatically displays a red circle containing an exclamation mark next to the control. If the user hovers the mouse over the circle, the ErrorProvider displays a tooltip giving the error text.