how to get Custom List Item Property

Question

I added a new column to Sharepoint Custom list which is boolean type, now each time I upload a item to list, it displays that column to check or leave it blank, by default its checked, I wanna access this property programmatically but can't remember how to do it.

public void Documents(string URL)
{
    using (SPSite site = new SPSite(URL))
    using (SPWeb web = site.OpenWeb())
    {
        SPList list = web.Lists["Mes"];

        if (list.ItemCount != 0)
        {
            foreach (SPListItem listItem in list.Items)
            {
                if(listItem.)
            }
        }
    }
}

Edited

I guess using this statement

listItem.Properties["columnName"];

Answer 1

I think it's actually:

listitem["columnname"]

in SharePoint 2007/WSS 3.0