treeview flickering

[Sam]

Hi,
On my main form in my MDI application, I have two treeview, one on the
right, which is actually a UserControl inherited from Treeview, and the
other on the left.

When I click on a node in the left Treeview, all the nodes in BOTH
Treeview disappear for some milliseconds.

First question: Why do I get this nasty effect?
Second question: Why does it affect BOTH Treeview, since they are
completely independant ??

Thank you

 

[Sam]

Does nobody know about that ? :-( I'm still having this problem.