Accesing constructor's base class properties

In order to use a C1DropDownControl inside a C1InputPanel I need to define a class that inherits from the InputControlHost class and then invoke the desired control's constructor, like this:

public class InputC1DropDownControl : InputControlHost
{
    public InputC1DropDownControl()
        : base(new C1DropDownControl())
    {

    }
}

By doing that I can see the C1DropDownControl inside the C1InputPanel (it's some kind of a special ComboBox) but I can't access all of it's properties. So, my question is: how can I access the C1DropDownControl properties from an InputC1DropDownControl object (which obviously inherits from a different class)?