uiwait(FIG_handle) blocks execution until either UIRESUME is called or the figure FIG is destroyed (closed). uiwait with no input arguments is the same as uiwait(gcf). In this example, a figure is created along with a pushbutton. After the figure is created, uiwait is called until you push the button. When you push the button, the callback calls uiresume.
f = figure('pos',[30 800 250 150]);
h = uicontrol('Position', [20 20 200 40], 'String', 'Continue', ...
'Callback', 'uiresume(gcbf);close(gcbf)');
disp('This will print immediately');
uiwait(gcf);
disp('This will print after you click Continue');
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