How to judge if the commandbars should be update

when loadcommandbars(), I hope to judge if the commandbars has been changed, if it's changed, then give me an option to load the new commandbars or still use the old one.

for example: when I change the shortcut key for Copy to Ctrl+C to Alt+W, the program should export a dialog to show these two options when it starts.
Thanks.

I know what you said now. But tell me how to change the shortcut key.
For example， I didn't set any hot key for copy, but now I hope to set Alt+W for copy, the question is that, even I set Alt+W in my codes, after execute LoadCommands(), the copy still has no hot key. While I need to execute LoadCommands() each time for I need the customized information user sets last time.

I could see alt+w if I don't call loadcommandbars().