How to z-order a window?

[amcan27]

Hello, I'm using vb.net . I want to make a window behind all other windows. I don't want to use hide() and SendToBack() don't work. How can I do it? thanks

[dynamic]

there isnt a zorder like in vb6 ,but SendtoBack works fine, i just placed a listview over the top of a richtextbox then on a command button did the following ListView1.SendToBack() and the listview got sent to the back ( behind the richtextbox )