Tooltips in .Net treeview

Hi,

I have a treeview (.net control) in one application but I would like to add the possibility that  the user could show or hide the tooltips on the different nodes of the treeview.  Currently, the tooltips seem to be generate automatically and I can't find a way to hide them.  Some of them are pretty long and I don't want to show them.

Is there a way, with a button that a user could press, to hide or show all the tooltips on a .net treeview?

Thanks for your help,

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