Running GFA-BASIC 32 under XP or better (Vista/7) it applies the Windows XP Visual Styles. The controls are drawn using a new look using a newer common control library. The IDE uses the newer look because of the presence of manifest file in the same directory as the GfaWin32.exe. When you create an EXE for your own GFA-BASIC application you must not forget to include a manifest file using the same name as your application.
Go to the CodeProject site for a brief introduction on Applying Windows XP Visual Styles.
For an implementation of a GFA-BASIC 32 project go to Peter Heinzig site for an example http://www.peterheinzig.de