Winform custom control value doesn't get updated from bound property

I've created some custom controls that work with databinding. However, while the first two controls works quite well, I can't understand why this doesn't work.

What should I implement to allow my control bound property to get updated with the source property? On the other controls I used only a ValueCha开发者_运维百科nged event but it's not working here.

Here's code. What you should know is that CustomAllowedKeys is a list that contains valid Keys in string version

http://pastie.org/2120933

Any help appreciated

As microsoft stated, and as I can see over the web, this is a bug found in winform and not fixed.

Best article I found at the moment: http://www.west-wind.com/weblog/posts/2006/Jan/12/More-BindingSource-WinForm-Databinding-frustrations