c# - Loading a WinForms UserControl into a WPF UserControl? -

i have wpf application, , winforms usercontrol opentk 3d viewport. trying load opentk usercontrol wpf usercontrol, in turn loaded window. compiles, viewport not show.

my code is:

//winforms form

namespace opentk_viewport {     public partial class form3dviewport : usercontrol     {          public form3dviewport()         {             initializecomponent();          } } 

//wpf usercontrol

<grid>         <wrappanel name="load3d" horizontalalignment="left"  verticalalignment="top"/>     </grid>     public partial class form3dhost : system.windows.controls.usercontrol     {         public form3dhost()         {             initializecomponent();              // create interop host control.             system.windows.forms.integration.windowsformshost host =                 new system.windows.forms.integration.windowsformshost();              // create maskedtextbox control.             opentk_viewport.form3dviewport view = new opentk_viewport.form3dviewport();              // assign control host control's child.             host.child = view;              // add interop host control collection of child controls.             load3d.children.add(host);          }             } 

then load usercontrol into:

  <xctk:wrappanel name="view3dloader" />    ui.form3dhost view = new ui.form3dhost();             view3dloader.children.add(view); 

but nothing shows up, , yet there no error. missing?

thank you.