Custom Combo Problem

Hi All

Hope someone can help with this!

I have a custom control that combines a treeview with a combo, the combo in the control is made from a textbox and button and the treeview is just a treeview.

Everything works ok, apart from when i put the control on a panel, the treeview drop down doesn't overlap the edge of the panel it just goes behind it. (Hence so its useless!)

I have tried bringing it to front, but im only new to custom controls and have run out of ideas!

Hope some brainy person can help

Regards

Danny