Below is the C# function to call the lists.asmx MOSS Web Service to get list items from a list/document library.
Add reference to lists.asmx to your project and use the following code:
private void GetItems(string strListName)
{
try
{
    #region Connect to URL
    this.m_objWSSListService.Url = this.cmbURL.Text.Trim('/') + "/_vti_bin/lists.asmx";
    string sDomain = string.Empty;
    string sUserName = this.txtLogin.Text.Trim();
    if (sUserName.IndexOf("\\") > 0)
    {
        sDomain = sUserName.Split("\\".ToCharArray())[0];
        sUserName = sUserName.Split("\\".ToCharArray())[1];
    }
    this.m_objWSSListService.Credentials = new System.Net.NetworkCredential(sUserName, this.txtPassword.Text.Trim(), sDomain);
    #endregion
    string sListName = strListName;
    string SourceDocumentURL = "";
    string strTempLocation = "C:\\Temp\\";
    string strFileName = "";
    System.Xml.XmlNode xnListSchema = m_objWSSListService.GetList(sListName);
    //get the Data from the List
    System.Xml.XmlDocument xdListData = new System.Xml.XmlDocument();
    System.Xml.XmlNode xnQuery = xdListData.CreateElement("Query");
    System.Xml.XmlNode xnViewFields = xdListData.CreateElement("ViewFields");
    System.Xml.XmlNode xnQueryOptions = xdListData.CreateElement("QueryOptions");
    System.Xml.XmlNode xnListData = m_objWSSListService.GetListItems(sListName, null, xnQuery, xnViewFields, null, xnQueryOptions);
    if (!Directory.Exists(strTempLocation))
    {
        Directory.CreateDirectory(strTempLocation);
    }
    foreach (XmlNode outerNode in xnListData.ChildNodes)
    {
        if (outerNode.NodeType.Equals(System.Xml.XmlNodeType.Element))
        {
            foreach (XmlNode node in outerNode.ChildNodes)
            {
                if (node.NodeType.Equals(System.Xml.XmlNodeType.Element))
                {
                    MessageBox.Show(node.Attributes.GetNamedItem("ows_Title").InnerText);
                }
            }
        }
    }
}
catch (System.Exception ex)
{
    this.WriteLog(ex.ToString());
}
}
 
 
