Pass value between windows

hi,

let me explain my issue

let there be three windows win1 , win2, win3.  where win1 is the main window objects for win2 and win3 are created in win1 thus both windows are shown.

i want to sent a value from win2 to win3 or i want to trigger a function in win3 from win2. where i could not create object for

win1 and pass the value to win3 through win1 which might end in object looping. I want the directly put the value to win3. is there a way to do that.

Thank you