Can you share a sample which has a support for checkbox in radtreeview with support for selecting an item using spacebar and mouse. Actually i created a treeview with keyboard support but using spacebar and mouse it is causing some strange behavior. I select some nodes using spacebar, then select 1 using mouse click, now when i again go and select another one using spacebar the previously selected item, using mouse, gets deselected. It looks like the checked event is fired for both the current and the previous node. A sample would help as I am not able to get the exact problem.