How to change delphi GUI styling?

OK I don't know much about delphi but I have done a few projects and normally have typical windows component styling like so:

I was working on a project that I started from some demo code, however, and the style is completely off, as can be seen from this button:

I am not sure why it is different as I a开发者_运维技巧m using identical components. Is there some project setting I can change to get my normal stuff back on this application?

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Yes. Open Project -> Options -> Application and check the "Enable runtime themes" box and that should fix it for you.