Vista - Position of Control

hello @all,

how can i get the position of a control to my display? I would like use a
popup control on a button. Is the window (the host from my button) on the
right site of my disply and the button also in my window, i would like that
the popup control not dock on the right site of my button but on the left
site on my button. now i will use the position from my button control in
context to my display. It is possible?

thanks for all answer and sorry for my badly english

TOM_MUE
www.tom-mue.de