Modeless form always on top; not fsstayontop

Hi!

I have a sdi application with a mainform.formstyle of fsnormal. I want
to show my own find dialog form, that needs to be modeless, but should
be on top of the main form all the time.

Setting formstyle of the find form to fsstaysontop moves the form on top
of all other windows, even on top of other applications windows and the
taskbar. What I need is to have the form on top of my main window only,
but not on top of other applications windows.

How to???

Thanks,
Marcus