How can I centre an axes object in a GUI figure?

I have created a GUI figure containing an axes object (for displaying images), along with a few objects such as buttons. I have set the size of the GUI figure to fill most of the screen, whatever the PC's screen size, using:

set(gcf, 'units', 'normalized', 'position', [0.05 0.15 0.9 0.8]);

in OpeningFcn. This seems to work OK, But the axes object within the figure always hugs the left side of the GUI figure. How can I make it stay in the middle of the figure regardless of the latter's size? Ideally the other objects also need to stay evenly spaced horizontally too. Online help talks about using a call to align with 'bounding box', but I can't see how to set a bounding box for a group of objects, so that the group remains centred in the GUI. Any suggestions please? Thanks, George

[Geoff Hayes]

George - are you using GUIDE (since you have an OpeningFcn) or are you programmatically creating your GUI? If the former, you could look at GUIDE GUI options and perhaps select a proportional resize behaviour.