C# WPF reset tab order of controls at runtime -

i'm developing wpf application have various controls (both out of box wpf controls , telerik controls). in 1 of sections of application grid various items can dragged around rearrange position of item on grid in relation other items.

when loading application default tab order goes through various controls expected , once reaches grid section sequentially tabs through each control top left down bottom right - expected.

then after drag 1 of items within grid location of items shuffle along when try tab through items not recognise new order of tiles.

my question is, how able reset tabbing order on controls reflect latest position of them within grid?

notes:

• the controls using built drag , drop.
• the control called radtileview (telerik control), sub-items dragging , dropping called radtileviewitems
• i don't believe within telerik documentation addresses specifically
• surely isn't telerik problem; possible create custom drag , drop functionality within wpf possibly issue there too.
• i implementing mvvm.