absolute positioning

[JV]

I know this must be easy but it's bloody hard to find documentation on.

When ASP.NET controls are created, by default they create style attributes
that assume absolute positioning and they set the "top" and "left" to the
place where the control was dropped.

I have found no example of how to make my control do this?

 

[JV]

Correction: it works fine in design time, but does not render at runtime.
Do I need to manually render the style attributes?