I don't know about most developers who are new to a topic but when I am learning something new, I would prefer to see lots of examples on how to use a method (and copy it into my own project) rather than to read all about it from top to bottom. Therefore this code sample shows a simple use of the OpenWeb() method and how it could be used to create a new subsite called "news" under and existing site called "sections":

(This will create a subsite based on the CMSPUBLISHING#0 template which is installed as part of Sharepoint 2007).

using (SPSite topLevelSite = new SPSite(http://www.yourwebsite.co.uk/sections))

{

using (SPWeb topLevelSiteWeb = topLevelSite.OpenWeb())

{

topLevelSiteWeb.AllowUnsafeUpdates = true;
SPWebCollection subSites = topLevelSiteWeb.Webs;

SPWeb newSubWeb = subSites.Add("news", "Title of your news site", "Description of your news site", 1033, "CMSPUBLISHING#0", false, false);

newSubWeb.Dispose(); //Clean up SPWeb memory resources.

topLevelSiteWeb.AllowUnsafeUpdates = false;

}

}

When you use SPSite.OpenWeb, you need to use 'using' or dispose to clean-up. Refer to http://msdn2.microsoft.com/en-us/library/aa973248.aspx