>Yesterday my application forms also had the Windows classic look, but I don't know if it is because I have refreshed the theme, but now the application windows look rounded. The command window and the project manager still have the Windows Classic look.

If you have Outlook and set it up to include the preview pane, notice that the slider for the list of messages is "square" like Win2K but the slider for the preview pane has the rounded WinXP look. So, the mix-and-match appears in places other than VFP.