private void OnHandleDestroyed(object sender, EventArgs e)
{
if (_filterInstalled)
{
Application.RemoveMessageFilter(_filter);
_filterInstalled = false;
_filter = null;
}
}
private void OnContainsFocus()
{
if (!_filterInstalled)
{
if (_filter == null)
{
_filter = new ComponentContainerScrollMessageFiler(this);
}
Application.AddMessageFilter(_filter);
_filterInstalled = true;
}
}