Panel Stretching Full Width of screen

[cokedrivers]

Hello again,
I'm trying to get my custom Datapanel stretch from sreenedge to screenedge. Below are the screenshots & code for what im using.

1280x800



1280x1024


Now here is the code to get the Width of the datapanel:

DataBorderPanel:SetWidth(GetScreenWidth() * UIParent:GetEffectiveScale())

As you can see by the screen shots above the 1280x800 stretches almost all the way across the screen but my native resolution 1280x1024 does not.

is there a better way to make this happen?

Thanks for any help with this issue.

Coke