why a popup-menu does not open at a new defined mouseloc?

[G.W.Gaich]

Hi all,

does anyone know why a popup-menu does not open at a new defined mouseloc?


 -- the mouse is at 101,105 in a card

in an arrowkey-script of a field:
   
    ....
answer the mouseloc  --> 101,105
        
set the screenmouseloc to globalloc(the loc of btn "b")
 -- the loc of button "b" is at 120,170

answer the mouseloc --> 120,170 --> ok

-- in mousedown of btn "b" there is a popup

send "mousedown" to btn "b"
  ....

 -- the popup opens at 101,105
 -- not at 120,170

Why???

Windows XP, rev 4.0.0-gm-1

Thanks

Wolfgang