function MBB_OnUpdate(elapsed)
...
  local children = {Minimap:GetChildren()};
  local additional = {MinimapBackdrop:GetChildren()};
  for _,child in ipairs(additional) do
   table.insert(children, child);
  end
  for _,child in ipairs(MBB_Include) do
   local childframe = _G[child]
   if( childframe ) then
    table.insert(children, childframe);
   end
  end
  for _,child in ipairs(children) do
   if( not child.oshow and child:GetName() and not MBB_IsKnownButton(child:GetName(), 3) ) then
    if( not child:HasScript("OnClick") ) then
     for _,subchild in ipairs({child:GetChildren()}) do
      if( subchild:HasScript("OnClick") ) then
       child = subchild;
       child.hasParentFrame = true;
       break;
      end
     end
    end
    local hasClick, hasMouseUp, hasMouseDown, hasEnter, hasLeave = MBB_TestFrame(child:GetName());
    if( hasClick or hasMouseUp or hasMouseDown ) then
     MBB_PrepareButton(child:GetName());
     if( not MBB_IsInArray(MBB_Exclude, child:GetName()) ) then
      MBB_AddButton(child:GetName());
      MBB_SetPositions();
     end
    end
   end