Hi Fabio,

There's nothing in your post that proves that it's a bug.

>If you use ZOrder methods for a control X, with controls index XIndex,:
>

>X.Parent.Controls[m.XIndex]=X
>

>
>the result is that the XIndex change to 1 or to ControlCount:
>

>X.Zorder(0) && -> m.XIndex = X.Parent.ControlCount
>
>X.Zorder(1) && -> m.XIndex = 1
>

>and all other controls index roll up or down.
>
>Then, controls index true meant is Zindex !
>
>You cannot to use ZOrder and controls[] for reference to a specific control.
>
>Repro:
<snip>
>
>Today i have lost the control index.
>