I have an UserControl (Windows Application - .NET Framework 3.5) which is composed of a TextBox and ListBox: it should pretty much emulate a "suggestion box" just like the ones in Google and other various search engines.
Now, the initial status of this control (TextBox blank) imply the ListBox listing the suggestions to be invisible, and that's where it comes the pain.
No matter I set the Visibility of the ListBox to false and even the BackColor of the UserControl to Transparent: it's still taking up his space greying the lower level controls.
I hope I've explained myself properly, as I'm Italian and my english is not very good. Anyway, to make it clearer, I've attached a printscreen of what is happening.
Any help is very appreciated.