combobox

Hello all
I have a GUI with frame and buttons. How I can put WITH THIS CODE combobox to this frame?

In the marked in red region?

And code:

 destroy  .buttons destroy  .combo destroy  .combo1 toplevel .buttons wm title .buttons 'Menu' set count 0  proc add_frame title {   global frame count   set bold 0   set frame .buttons.frame$count   frame $frame -border 5 -relief groove    label $frame.label -text $title -font 'arial 10 bold' -foreground red    pack  $frame       -side left -padx 2 -pady 2 -anchor n -fill both   pack  $frame.label -side top  -padx 2 -pady 2   incr count } proc add_button {title command} {   global frame count   button $frame.$count -text $title -command $command -font 'arial 10'   pack   $frame.$count -side top -pady 1 -padx 1 -fill x   incr count } add_frame  'Components view' add_button 'Show all mesh'     {} add_button 'Hide all mesh'     {} add_button 'Show all elements'              { } add_button 'Hide all elements'         {   } add_button 'Show surface edges' {} add_button '22222' {} add_button '33333' {}  add_frame  '2D Mesh ()' add_button 'Add mesh to displayed surfs'   {}