App theme changes according to windows theme

Question

I am developing an application using Delphi 2007 (IDE CodeGear RAD Studio). This app is made to be used in Windows 7.

While developing an app I was using a Classic (Win98) theme, and my app has the same theme. Even beeing build on my computer and lunched on other computer with theme 'Aero', it looked as 'win98'.

After a while I changed my Windows theme to Aero, and my app started looking the same (Aero) way.

Later, when I swiched Windows theme back to Classic, my App started to look classic way. But on computers with Aero App started to look like Aero.

So here is a question:

1. Is there any possible chance to prevent my app theme from changing (set theme to classic not depending on windows theme)?
2. Why did the theme start changing?

Answer 1

Your app includes the comctl32 v6 manifest, because the Enable runtime themes option is selected. Disable that option and your app will not be themed.