How to: Remove a Meeting from a Meeting Workspace

Dim listObj As New Web_Reference.Lists()
listObj.Credentials = System.Net.CredentialCache.DefaultCredentials

'Get Meeting Workspace URL.
Console.Write("Enter the URL of the Meeting Workspace: ")
Dim baseURL As String = Console.ReadLine()

'Set URL properties for both objects.
listObj.Url = baseURL + "/_vti_bin/lists.asmx"
meetObj.Url = baseURL + "/_vti_bin/meetings.asmx"

'Get meeting InstanceID.
Console.Write("Enter the InstanceID of the meeting: ")
Dim InstanceID As String = Console.ReadLine()

Dim xmlDoc As New XmlDocument()

Dim ndQuery As XmlNode = xmlDoc.CreateNode(XmlNodeType.Element, "Query", "")
Dim ndViewFields As XmlNode = xmlDoc.CreateNode(XmlNodeType.Element, "ViewFields", "")
Dim ndQueryOptions As XmlNode = xmlDoc.CreateNode(XmlNodeType.Element, "QueryOptions", "")

'Create Query to filter based on the InstanceID provided.
ndQuery.InnerXml = "<Where><Eq><FieldRef Name=""ID""/> + 
     "<Value Type=""Counter""> + InstanceID + "</Value></Eq></Where>"

Try
   'Call GetListItems Web service to get meeting UID.
   Dim ndResult As XmlNode = listObj.GetListItems("Meeting Series", "", ndQuery, ndViewFields, "0", ndQueryOptions)
   Dim MainNode As XmlNode = ndResult.ChildNodes.Item(1)
   MainNode = MainNode.ChildNodes.Item(1)
   Dim eventUID As XmlNode = MainNode.Attributes.GetNamedItem("ows_EventUID")
   Dim UID As String = eventUID.InnerText
   
   'Call RemoveMeeting Web service to cancel meeting.
   'NOTE: You might need to increase the sequence number depending
   'on how many updates have already been made to the meeting.
   meetObj.RemoveMeeting(0, UID, 0, DateTime.Now, True)
   
   Console.WriteLine("Meeting canceled successfully.")
   
   Catch ex As System.Web.Services.Protocols.SoapException
      Console.WriteLine(("Message:" + ControlChars.Lf + 
      ex.Message + ControlChars.Lf + "Detail:" + ControlChars.Lf + 
      ex.Detail.InnerText + ControlChars.Lf + "StackTrace:" + 
      ControlChars.Lf + ex.StackTrace))
End Try

/*Create necessary objects and set credentials.*/
Web_Reference.Meetings meetObj = 
   new Web_Reference_Folder_Name.Meetings();
meetObj.Credentials = System.Net.CredentialCache.DefaultCredentials;

Web_Reference.Lists listObj = 
   new Web_Reference.Lists();
listObj.Credentials = System.Net.CredentialCache.DefaultCredentials;

/*Get Meeting Workspace URL.*/
Console.Write("Enter the URL of the Meeting Workspace: ");
string baseURL = Console.ReadLine();

/*Set URL properties for both objects.*/
listObj.Url = baseURL + "/_vti_bin/lists.asmx";
meetObj.Url = baseURL + "/_vti_bin/meetings.asmx";

/*Get meeting InstanceID.*/
Console.Write("Enter the InstanceID of the meeting: ");
string InstanceID = Console.ReadLine();

XmlDocument xmlDoc = new XmlDocument();

XmlNode ndQuery = 
   xmlDoc.CreateNode(XmlNodeType.Element,"Query", "");
XmlNode ndViewFields = 
   xmlDoc.CreateNode(XmlNodeType.Element,"ViewFields","");
XmlNode ndQueryOptions = 
   xmlDoc.CreateNode(XmlNodeType.Element,"QueryOptions","");

// Create query to filter based on the InstanceID provided.
ndQuery.InnerXml = 
   @"<Where><Eq><FieldRef Name=""ID""/><Value Type=""Counter"">" +
   InstanceID + "</Value></Eq></Where>";

try
{
   /*Call GetListItems Web service to get meeting UID.*/
   XmlNode ndResult = 
      listObj.GetListItems("Meeting Series", "", ndQuery, 
      ndViewFields, "0", ndQueryOptions);
   XmlNode MainNode = ndResult.ChildNodes.Item(1);
   MainNode = MainNode.ChildNodes.Item(1);
   XmlNode eventUID = 
      MainNode.Attributes.GetNamedItem("ows_EventUID");
   string UID = eventUID.InnerText;

   /*Call RemoveMeeting Web service to cancel meeting.
   NOTE: You might need to increase the sequence number depending
   on how many updates have already been made to the meeting.*/
   meetObj.RemoveMeeting(0, UID, 0, DateTime.Now, true);

   Console.WriteLine("Meeting canceled successfully.");
}
catch (System.Web.Services.Protocols.SoapException ex)
{
   Console.WriteLine("Message:\n" + ex.Message + "\nDetail:\n" + 
      ex.Detail.InnerText + "\nStackTrace:\n" + ex.StackTrace);
}