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Valid Event

  • 项目

Occurs before a control loses the focus.

PROCEDURE Control.Valid

Remarks

If the Valid event returns true (.T.), the control can lose focus - focus might not pass to another control. If the Valid event returns false (.F.), the control does not lose focus.

The Valid event can also return a numeric value. Returning a numeric value has one of three effects:

  • If 0 is returned, the control does not lose focus.
  • If a positive value is returned, the value specifies the number of controls the focus advances.
  • If a negative value is returned, the value specifies the number of controls the focus moves back. For example, if the Valid event returns –1, the previous control gets the focus.

See Also

LostFocus Event | When Event

Applies To: CheckBox | ComboBox | CommandButton | CommandGroup | EditBox | Grid | ListBox | OptionButton | OptionGroup | Spinner | TextBox