winfo children

A subcommand of Tk's winfo command.

winfo children window

Returns a list containing the path names of all the children of window. Top-level windows are returned as children of their logical parents. The list is in stacking order, with the lowest window first, except for Top-level windows which are not returned in stacking order. Use the wm stackorder command to query the stacking order of Top-level windows.

To get a list of all windows in a widget heirarchy, you can use a proc like this:

 proc wlist {{W .}} {
   set list [list $W]
   foreach w [winfo children $W] {
     set list [concat $list [wlist $w]]
   }
   return $list
 }