When copy the RadMultiColumnComboBox control it pastes the underling grid as a separate control. Workaround: Place the RadMultiColumnComboBox on a UserControl, and introduce the desired settings there. Then reuse the user control in your forms.
There are two options I can offer until this is resolved: 1. Place the control on a UserControl, and introduce the desired settings there. Then reuse the user control in your forms. 2. Inherit the control, introduce the desired settings and use the inheritor in your forms.
Now it takes way too long to setup initial control and then wanting to implement that in different forms. Normally you would just copy the control including item setting and then implement the handling og events... Now I can start from scratch with items and settings AND implement event code. Or copy the design code and make that work in the other form - which takes almost as much time. Right now I'm a bit sorry I started using this control, I'm not used to using controls from Telerik that work this bad. That's actually a compliment, love your stuff - just now this... :)