MATLAB: Button question

push button

How to enable the button presses down when the change color ?
hstat = uicontrol('unit','pixel','style','checkbox','value',0,'position',...
[160 10 25 25]);
hstat1 = uicontrol('unit','pixel','style','checkbox','value',0,'position',...
[160 40 25 25]);
hstat2 = uicontrol('unit','pixel','style','checkbox','value',0,'position',...
[160 70 25 25]);
hstat3 = uicontrol('unit','pixel','style','checkbox','value',0,'position',...
[160 100 25 25]);
hplay = uicontrol('unit','pixel','style','pushbutton','string','PLAY',...
'position',[10 10 50 25],'callback',{@play_callback});
hplay1 = uicontrol('unit','pixel','style','pushbutton','string','PLAY',...
'position',[10 40 50 25],'callback',{@play1_callback});
hplay2 = uicontrol('unit','pixel','style','pushbutton','string','PLAY',...
'position',[10 70 50 25],'callback',{@play2_callback});
hplay3 = uicontrol('unit','pixel','style','pushbutton','string','PLAY',...
'position',[10 100 50 25],'callback',{@play3_callback});
hstop = uicontrol('unit','pixel','style','pushbutton','string','STOP',...
'position',[60 10 50 25],'callback',@stop_callback);
hstop1 = uicontrol('unit','pixel','style','pushbutton','string','STOP',...
'position',[60 40 50 25],'callback',@stop1_callback);
hstop2 = uicontrol('unit','pixel','style','pushbutton','string','STOP',...
'position',[60 70 50 25],'callback',@stop2_callback);
hstop3 = uicontrol('unit','pixel','style','pushbutton','string','STOP',...
'position',[60 100 50 25],'callback',@stop3_callback);
hexit = uicontrol('unit','pixel','style','pushbutton','string','EXIT',...
'position',[110 10 50 25],'callback',@exit_callback);