how do i set any control to the topmost of the screen. For e.g. i have a textblock in a datatemplate or a hierarchichal data template..etc... now i would like to set this te
ZIndex is relative to other controls in the same Panel. A number higher than another control will ensure it appears "above" that control.
If your controls aren't all in the same Panel, ZIndex won't help you. You may need to give more information on exactly what you're doing, but it sounds like an Adorner will be of more use to you.