C# and the WinXP look-and-feel

Hi; I've written a crappy little C# application just to have a bit of a play with it, and I can't seem to work out how to get the controls to take on the WinXP look-and-feel. Using the manifest files with my C++ code works fine, but I can't work out how it hangs together with C#. Can anyone give me a nudge in the right direction? TIA.