The syntax for disabling warnings is as follows:
#pragma warning disable 414, 3021
Or, expressed more generally:
#pragma wa
FYI -
If you're using Visual Studio 2008, you can get the code directly from the Error List by right-clicking the error, and selecting Show Error Help from the context menu. The Help window should pop up, and show you everything you ever wanted to know about the error a la the MSDN website.
Could save you a bit of time.