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WindowsFormsHost issue with infragistics controls


My application is a WPF window, in which i'm hosting a WPF pane with winform control using WindowsFormsHost. 
Winform control has infragistics control mainly using ultratree.

When this pane hosting WIndowsFormsHost is in unpinned state or it is in tabbed state with some other pane, following issues occur:
1) Scrollbar stop working, it doesn't scroll with mouse wheel, it only works by clicking on the down and up arrows of the scrollabr

2) Checkbox state cannot be changed, it cannot be checked/unchecked its state remains same.

3) Drag  drop of tree stopped working, no node can be dragged.

4) Tooltips doesn't show up when mouse is hovered on them

All these issues don't occur with normal winform controls being hosted in WPF window using WIndowsFormsHost. these are just happening with the infragistics controls.

Please let me know, what needs to be done to make these work, I've just changed my winform window into WPF and it is a big show stopper for my application.