Question

I’m confused, can anyone help me out?

Edit

My problem is that I have created an ActiveX control in Delphi and I just can’t get it to play nicely in WPF land. I have looked at the relevant MSDN pages, and it looks like it SHOULD work, so I may have gone wrong in the way that I have created the ActiveX control in the first place.

See Hosting ActiveX control in WPF

Answer 1

Have a look at the official documentation for both classes

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Here is the Class signature for System.Windows.Controls.control class

public class Control : FrameworkElement

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Here is the Class signature for System.Windows.Forms.Control class

public class Control : Component, IOleControl, 
    IOleObject, IOleInPlaceObject, IOleInPlaceActiveObject, IOleWindow, IViewObject, 
    IViewObject2, IPersist, IPersistStreamInit, IPersistPropertyBag, IPersistStorage, 
    IQuickActivate, ISupportOleDropSource, IDropTarget, ISynchronizeInvoke, IWin32Window, 
    IArrangedElement, IBindableComponent, IComponent, IDisposable

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