[texhax] how to position a box on an absolute position

[t152 at vmars.tuwien.ac.at]

I am currently writing a macro, that places some text in the
upper righthand corner of the first page of each chapter without
influencing the formatting of the remainder.

using this macro before the \section-command doesn't work, since the
\chapter-command contains a \clearpage command and the headline would
be placed on the next page.

I have a solution that does something like the following:

\vspace{-10cm}
\raisebox{10cm}{ ... }

This works quite well apart from the fact, that the position of
the text depends on the number of lines of the headline because
the position is determined relative to the current position.

How is it possible to place a box on a particular position
(in absolute values) and continuing typesetting the remaining
text at the normal position (as if no box has been set in the
mean-time).

Thanx in advance for your help

Tom