CheckBox.CheckedChanged Event


Occurs when the value of the Checked property changes.

 event EventHandler ^ CheckedChanged;
public event EventHandler CheckedChanged;
member this.CheckedChanged : EventHandler 
Public Custom Event CheckedChanged As EventHandler 

Event Type



The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the CheckedChanged event. This report helps you to learn when the event occurs and can assist you in debugging. To report on multiple events or on events that occur frequently, consider replacing MessageBox.Show with Console.WriteLine or appending the message to a multiline TextBox.

To run the example code, paste it into a project that contains an instance of type CheckBox named CheckBox1. Then ensure that the event handler is associated with the CheckedChanged event.

private void CheckBox1_CheckedChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the CheckBox.CheckedChanged event.");
Private Sub CheckBox1_CheckedChanged(sender as Object, e as EventArgs) _ 
     Handles CheckBox1.CheckedChanged

   MessageBox.Show("You are in the CheckBox.CheckedChanged event.")

End Sub


For more information about handling events, see Handling and Raising Events.

Applies to

See also