Ever wondered why your winforms app looks good (ie shows Windows XP type styling) in the Visual Studio designer (VS2005) yet when you run it, it looks very Windows 2000 (not very colorful and no rounded corners)?
That's because by the XP styling is turned off by default. To enable it, include the following line in your form's constructor:
System.Windows.Forms.Application.EnableVisualStyles();
Simple when you know huh.
HTH
Tim