For more information about handling events, see Consuming Events.

Note
Changing the Enabled property of a ToolStrip does not raise the VisibleChanged event. Raise this event with specific property settings.

The following code example demonstrates the use of this member. In the example, an event handler reports on the occurrence of the VisibleChanged 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 a type that inherits from ToolStripItem, such as a ToolStripButton or ToolStripMenuItem. Then name the instance ToolStripItem1 and ensure that the event handler is associated with the VisibleChanged event.

Private Sub ToolStripItem1_VisibleChanged(sender as Object, e as EventArgs) _ 
     Handles ToolStripItem1.VisibleChanged

   MessageBox.Show("You are in the ToolStripItem.VisibleChanged event.")

End Sub

private void ToolStripItem1_VisibleChanged(Object sender, EventArgs e) {

   MessageBox.Show("You are in the ToolStripItem.VisibleChanged event.");

}

.NET Framework

.NET Framework Client Profile

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference