How to show the zoom arround the mouse in subfigure window?

Dear all,

I want to have a figure with two subfigures such that in one subfigure the input image is shown, while in the other subfigure a live zoom is shown at the mouse position.

I am using this code but seems I don't have a correct control of the subfigure handles.

I = imread('cameraman.tif');

handleIN = subplot(1, 2, 1);

imshow(I);
pointersize = 30;
handles.side_pointer = scatter(nan, nan, pointersize, 'y', 'Marker', '*');
C = get (handleIN, 'CurrentPoint');
X = C(1,1);
Y = C(1,2);

[H W] = size(I);

if X>W;
    X = W-(2*W);  
end
if Y>H;
    Y= H-(2*H);   
end

%zoom around the mouse
zoomwidth = 100;
xleft = max(0, X-zoomwidth/2);
ybot = max(0, Y-zoomwidth/2);

hold on
handle = subplot(1, 2, 2);
set(handle,'HandleVisibility','ON');
set(handle, 'XLim', [xleft xleft+zoomwidth], 'YLim', [ybot ybot+zoomwidth]);
imshow(I)
hold off

drawnow();

Any idea how to make it works?

Best, Meshoo