Hi I have a very basic WPF question. Please forgive my ignorance. I have Visual Studio Solution with two VB Projects: Project A is a WPF program that contains x, x being an ObservableCollection(of Rec) where rec is a Class of some database record. Project B is a UserControl uc, containing, amongst other things a ListBox lb. The problem is how to display the x items in lb. Project A contains several instances of uc. Possible solution 1: Is there a way that I can bind lb directly to x? I seem to be unable to do so. Possible solution 2: Should I define a dependency property of ObservableCollection(of Rec) in B and give that a value in the Xaml of the uc instances. This also fails! Conceptually, this method has me worried, because I cannot see how uc obtains the rec info for formatting the records in its DataTemplate. I have to define the Property as a ObservableCollection(of Object) to get past the compiler! Possible solution 3. It cannot be done! BTW, I know enough to display x in a listbox defined in A quite nicely with a DataTemplate. I have searched Google long and hard without finding anything that throws light on my dilemma! Any insight will be much appreciated. David