How can I set a mouseclick callback function to UI controls created with app designer?

Hi,

I would like to set a callback function which executes when I click on uilistbox.

f2 = uifigure;
f2.WindowButtonDownFcn = @testCallback1;

list = uilistbox(f2);
list.Items = {'Red','Green','Blue'};
list.WindowButtonDownFcn = @testCallback2;

This code gives me an error as WindowButtonDownFcn apparently doesnt exist for uicontrols created with appdesigner(uifigure).

Is there any solution or callback function which I overlooked?

Thank you very much