toolStrip drag

Question

 Hi,
(first post up here )

I'm doing an MDI. I have the parent form (mdi container) and some child forms. My parent has a ToolStripPanel and my childs have a ToolStripContainer (first they had also a ToolStripPanel but they told me i'd better use a container instead of a panel for the childs)

When I create a ToolStrip in one of my childs or my parent and I want to drag it then I can move my ToolStrip to every panel/container from child to child from parent to child etc..

How can I make that I can only move my ToolStrip in the window where I created it. That I cannot drag it to an other form.

tnx

(sorry kinda new to c#)