MOSS: Creating subsites in site definition

Well, not really, but by using a MOSS 2007 Features you can automatically create sites below the site user just created. Other way to create sites is to use Provisioning.

FeatureEventHandler:

public override void FeatureActivated(SPFeatureReceiverProperties properties)

{

    using(SPWeb web = properties.Feature.Parent as SPWeb)

    {

        // Check that subsites do not already exist

        if(web.Webs.Count == 0)

        {

            // Create subsites

            try

            {

                web.Webs.Add("", "SubSite1 Title", "", 1033, "", false, false);

                web.Webs.Add("", "SubSite2 Title", "", 1033, "", false, false);

                web.Webs.Add("", "SubSite3 Title", "", 1033, "", false, false);

            }

            catch(Exception e)

            {

                throw new SPException("Error when trying to create subsites. Error: " +
             e.Message);

            }

        }

    }

}

Create new subsite Feature:

<feature id="7F4AA5EF-6A62-4a08-8565-DE39C02839E7"

title="Subsites"

description="Creates subsites for specific sites."

version="1.0.0.0"

hidden="TRUE"

scope="Web"

xmlns="http://schemas.microsoft.com/sharepoint/" receiverassembly="FeatureEventHandler,Version=1.0.0.0,Culture=neutral,PublicKeyToken=60a5c2355dc3549c"

receiverclass="Features.FeatureEventHandler">

</feature>