i find this solution:
h=findobj(newtab)
h =
9×1 graphics array:
Tab (CL)
GridLayout
UIAxes (Equity)
UIAxes (Equity)
UIAxes (Equity)
UIAxes (Equity)
Label (gg Vis)
NumericEditField (250)
Button (DRAW)
h(3) is the reference axis
or esist better method to catch it?