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MaskedTextBox.IsOverwriteModeChanged Event

Occurs after the insert mode has changed.

Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in

public event EventHandler IsOverwriteModeChanged
/** @event */
public void add_IsOverwriteModeChanged (EventHandler value)

/** @event */
public void remove_IsOverwriteModeChanged (EventHandler value)

In JScript, you can handle the events defined by a class, but you cannot define your own.
Not applicable.

The IsOverwriteModeChanged event is raised after value of the IsOverwriteMode property is changed.

This event is required to properly bind data to a MaskedTextBox control.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the IsOverwriteModeChanged 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 System.Windows.Forms.MessageBox.Show with System.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 MaskedTextBox named MaskedTextBox1. Then ensure that the event handler is associated with the IsOverwriteModeChanged event.

private void MaskedTextBox1_IsOverwriteModeChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the MaskedTextBox.IsOverwriteModeChanged event.");


Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0