MultiColumnComboBox broken in 5.1 beta

Hello,

I have code that worked fine (and in fact was suggested by Syncfusion) under 4.x that is now broken under 5.1 beta.

In short, operations - called before the parent form is shown - involving a MultiColumnComboBox's ListBox will fail because the ListBox is null.

For example, a form contains only a MCCB. In the form's ctor after InitializeComponent(), trying to add an EventHandler to the MCCB's ListBox will fail because it is null.

However, if the EventHandler is added after the form is displayed (via the click handler of a button for example) no exception is thrown.

I've attached a small project that demonstrates this behavior.

Using 4.x there were no such problems.

Is this a bug or are we supposed to initialize the ListBox outselves somehow? Please advise.

Keith

ComboBoxTest0.zip