'Declare and initialize a variable for the Lists Web service.
Dim listService As New sitesWebServiceLists.Lists()

'Authenticate the current user by passing their default
'credentials to the Web service from the system credential cache.
listService.Credentials = System.Net.CredentialCache.DefaultCredentials

'Set the Url property of the service for the path to a subsite.
listService.Url = "http://MyServer/sites/MySiteCollection/_vti_bin/Lists.asmx"

'Get Name attribute values (GUIDs) for list and view. 
Dim ndListView As System.Xml.XmlNode = listService.GetListAndView("MyList", "")
Dim strListID As String = ndListView.ChildNodes(0).Attributes("Name").Value
Dim strViewID As String = ndListView.ChildNodes(1).Attributes("Name").Value

'Create an XmlDocument object and construct a Batch element and its 'attributes. Note that an empty ViewName parameter causes the method 'to use the default view. 
Dim doc As New System.Xml.XmlDocument()
Dim batchElement As System.Xml.XmlElement = doc.CreateElement("Batch")
batchElement.SetAttribute("OnError", "Continue")
batchElement.SetAttribute("ListVersion", "1")
batchElement.SetAttribute("ViewName", strViewID)

'Specify methods for the batch post using CAML. To update or delete, 'specify the ID of the item, and to update or add, specify 
'the value to place in the specified columns.
batchElement.InnerXml = "<Method ID='1' Cmd='Update'>" +
   "<Field Name='ID'>6</Field>" +
   "<Field Name='Title'>Modified sixth item</Field></Method>" +
   "<Method ID='2' Cmd='Update'><Field Name='ID'>7</Field>" +
   "<Field Name='Title'>Modified seventh item</Field></Method>" +
   "<Method ID='3' Cmd='Delete'><Field Name='ID'>5</Field>" +
   "</Method><Method ID='4' Cmd='New'>" +
   "<Field Name='Title'>Added item</Field></Method>"

'Update list items. This example uses the list GUID, which is recommended, but the list display name will also work.
listService.UpdateListItems(strListID, batchElement)

/*Declare and initialize a variable for the Lists Web service.*/
sitesWebServiceLists.Lists listService = new sitesWebServiceLists.Lists();

/*Authenticate the current user by passing their default
credentials to the Web service from the system credential cache.*/
listService.Credentials =
System.Net.CredentialCache.DefaultCredentials;

/*Set the Url property of the service for the path to a subsite.*/
listService.Url = "http://MyServer/sites/MySiteCollection/_vti_bin/Lists.asmx";

/*Get Name attribute values (GUIDs) for list and view. */
System.Xml.XmlNode ndListView = listService.GetListAndView("MyList", "");
string strListID = ndListView.ChildNodes[0].Attributes["Name"].Value;
string strViewID = ndListView.ChildNodes[1].Attributes["Name"].Value;

/*Create an XmlDocument object and construct a Batch element and its attributes. Note that an empty ViewName parameter causes the method to use the default view. */
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
System.Xml.XmlElement batchElement = doc.CreateElement("Batch");
batchElement.SetAttribute("OnError", "Continue");
batchElement.SetAttribute("ListVersion", "1");
batchElement.SetAttribute("ViewName", strViewID);

/*Specify methods for the batch post using CAML. To update or delete, specify the ID of the item, and to update or add, specify 
the value to place in the specified column.*/
batchElement.InnerXml = "<Method ID='1' Cmd='Update'>" +
   "<Field Name='ID'>6</Field>" +
   "<Field Name='Title'>Modified sixth item</Field></Method>" +
   "<Method ID='2' Cmd='Update'><Field Name='ID'>7</Field>" +
   "<Field Name='Title'>Modified seventh item</Field></Method>" +
   "<Method ID='3' Cmd='Delete'><Field Name='ID'>5</Field>" +
   "</Method><Method ID='4' Cmd='New'>" +
   "<Field Name='Title'>Added item</Field></Method>";

/*Update list items. This example uses the list GUID, which is recommended, but the list display name will also work.*/
try
{
   listService.UpdateListItems(strListID, batchElement);
}
catch (SoapServerException ex)
{
   MessageBox.Show(ex.Message);
}