/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// tabcontrolcanceleventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this TabControlCancelEventHandler tabcontrolcanceleventhandler, Object sender, TabControlCancelEventArgs e, AsyncCallback callback)
{
if (tabcontrolcanceleventhandler == null)
{
throw new ArgumentNullException("tabcontrolcanceleventhandler");
}
return(tabcontrolcanceleventhandler.BeginInvoke(sender, e, callback, null));
}
protected virtual void OnSelecting(TabControlCancelEventArgs e)
{
TabControlCancelEventHandler eh = (TabControlCancelEventHandler)(Events[SelectingEvent]);
if (eh != null)
{
eh(this, e);
}
if (!e.Cancel)
{
OnSelected(new TabControlEventArgs(SelectedTab, selected_index, TabControlAction.Selected));
}
}
