Plot Axes From Other GUI

I have a button in GUI (Figure 1) that call other GUI (Figure 2). Figure 2 have a button to show the graph in Figure 1's axes. So, What syntax that can I use?

Before, I use the syntax below to show graphic1 in Figure 1 by the button in its own figure.

aa = figure(...
  'units','points',...
  'position',[125 67 760 485],...
  'color',[234/255 234/255 234/255],...
  'menubar','none',...
  'resize','off',...
  'numbertitle','on',...
  'name','graphic all');

    % button to call graph
    graphic1 = uicontrol('parent',aa,...
    'units','points',...
    'position',[130 5 70 16],...
    'style','pushbutton',...
    'string','Graph 1',...
    'fontname','Arial',...
    'fontweight','bold',...
    'fontsize',10,...
    'callback','plot(x,y)');

% and this syntax to plot in the same graph again set(aa,'currentaxes',graphic1); plot(x,y);

% may I change the 'currentaxes' so I can set the graphic1 from the syntax in other Figure ?