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Posted 31 Oct 2012

How to Send Lync Instant Message in Plain Text

, 1 Jul 2013
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This tip discusses how to send an instant message in plain text to a Lync receiver.


Yesterday boss said: Send Lync message! Oh Lord I thought, no problem, Google is my friend. But I found no Google hits. Help me Lord, do I have to do it from scratch? I looked in Lync SDK 10 samples, and found no good code. I found some articles on MSDN on what to do: Start a conversation, choose a modality, send a message. But no working code on How do I do it? So I scratched my head and started. After two days, I achieved this...

The Starting Code

Option Explicit On
Option Strict On
Imports Ly = Microsoft.Lync.Model
Imports Lyc = Microsoft.Lync.Model.Conversation
Imports System.DirectoryServices
Imports System.DirectoryServices.AccountManagement
Imports System.Text
Imports System.Reflection
Public Class frmMain
    Private ReadOnly gMessage As String = "Kilroy was here!"
    Private gClient As Ly.LyncClient
    Private gConversation As Ly.Conversation.Conversation
    Private gContact As Ly.Contact
    Private gParticipiant As Lyc.Participant
    Private gSearchIsFinished As Boolean = False

The Following Code

Private Sub btnGo_Click(ByVal sender As Object, _
	ByVal e As EventArgs) Handles btnGo.Click
    'get Lync id
    Dim LyncUri As String = String.Empty
    'initiate the boolean flag
    gSearchIsFinished = False
    LyncUri = GetLyncId(ADname)  'set your own function here

    'send Lync message if person is in AD
    If Not String.IsNullOrEmpty(LyncUri) Then
        'get a grab of the Lync client process
        gClient = Ly.LyncClient.GetClient()

        'start looking for the Lync message receiver
            (LyncUri, Ly.SearchProviders.GlobalAddressList, Ly.SearchFields.EmailAddresses, _
            Ly.SearchOptions.IncludeContactsWithoutSipOrTelUri, 1, AddressOf SearchCallback, _
        	New Object() {gClient.ContactManager, LyncUri})
        'wait for the callback to finish
        While Not gSearchIsFinished
        End While

        'add a conversation
        gConversation = gClient.ConversationManager.AddConversation()

        'add the new message receiver
        gParticipiant = gConversation.AddParticipant(gContact)

        'start sending the message
        Dim modal = DirectCast(gConversation.Modalities_
        	(Lyc.ModalityTypes.InstantMessage), Lyc.InstantMessageModality)
        modal.BeginSendMessage(gMessage, AddressOf SendMessageCallback, Nothing)
    End If

End Sub

Private Sub SendMessageCallback(ByVal r As IAsyncResult)
    gClient = Nothing
End Sub

Private Sub SearchCallback(ByVal r As IAsyncResult)
    Dim asyncState As Object() = DirectCast(r.AsyncState, Object())
    Dim cm As Ly.ContactManager = DirectCast(asyncState(0), Ly.ContactManager)
    gContact = Nothing
        Dim results As Ly.SearchResults = cm.EndSearch(r)
        If results.AllResults.Count = 0 Then
        ElseIf results.AllResults.Count = 1 Then 'you have a hit
            gContact = results.Contacts(0)
        End If
    Catch se As Ly.SearchException
        gSearchIsFinished = True
    End Try
End Sub


  • Start by setting a reference to Lync DLLs. I got them by downloading Lync SDK 10.
  • Import them into your program.
  • Get a grab on the Lync client.
  • Get the user URI, we have ours in the Active Directory.
  • Ask Lync to look it up.
  • A Lync URI is usually in the format
  • Wait for the callback to be done.
  • Send the message.

Sample of GetLyncId

Shared Function GetLyncId(ByVal Name As String) As String
    GetLyncId = String.Empty
    Dim Entry As New System.DirectoryServices.DirectoryEntry("LDAP://OU=Local Data,DC=XXXX,DC=local")
    Dim srch As New DirectorySearcher(Entry, _
        "(&(objectClass=user) (Name=" & Name.Trim & "))")
    With srch
        .SearchScope = SearchScope.Subtree
        .SizeLimit = 100
    End With
    Dim resEnt As SearchResult = srch.FindOne()
    If Not resEnt Is Nothing Then
        GetLyncId = CStr(resEnt.Properties("msrtcsip-primaryuseraddress").Item(0))
        If GetLyncId.StartsWith("sip:") Then
            GetLyncId = GetLyncId.Split(":"c)(1)
    End If
End Function


What I have to do next is encapsulate it in a module (static class if you are a C#er).

If you read this and used the code, got it working, and have ideas or suggestion/ideas for improvement, please let me know.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Michael Rosqvist
Web Developer
Sweden Sweden
No Biography provided

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