WarpBlt geometry puzzle

Hello all,

I can't figure this out:

Given an instance of WarpBlt, what is the formula giving the destination
of a specific original point?

I only need one point (for the record, the offset of a Form to be
rotated and magnified). The code in WarpBlt works incrementaly by
running over all original points. At the moment I can get the result by
hacking into that loop, but it is slow and ugly. There has to be a
direct formula, but I can't find it. Any idea?

Stef

> The code in WarpBlt works incrementaly by
> running over all original points.

Should read: by running over all destination points