disable keydown event in Context Menu Strip

Question

I am using a contextmenuStrip in Treeview . The problem is When

1. Open Context menu strip by right clicking TreeNode.
2. Do not select any item in Context Menu Strip .
3. Select any TreeNode in Treeview . Now Context Menu Disappears. (This is fine)
4. Now press any keyboard Key . Nothing is working . The control is still
with ContextMenuStrip popup menu even though it is has disappeared.


How to solve this problem ?. How to disable the Key down event in ContextMemuStrip in windows application ?