Showing list of lync windows on click of a button

Question

I am trying to develop a winform app where there is a button. On button click, list of lync windows should appear as they appear when we hover over the lync icon in system taskbar as below.

How can i get the same functionality on button click on my winform.

I am using Lync SDK 2013 but am fine with 2010 also.

So in summary, i want to simulate the function when we hover over the lync icon in taskbar in a button on my form. On click of the button, the list of the conversations would be displayed with the active/most recent one highlighted and clicking on that would take to that particular conversation window. Any ideas?

Thanks

Answer 1

If you're looking for all Lync conversations, use the ConversationManager.Conversations property in the SDK. There are also ConversationAdded and ConversationRemoved events on the ConversationManger, so you can keep your list updated in real-time.

Answer 2

It's a bit ugly, but when I tried to detect conversation windows, I had no other choice than enumerating all windows using the Windows API function EnumWindows and then check for the window class "LyncConversationWindowClass". But this was more than a year ago using Lync 2010 - don't know if it works with Lync 2013 or if there is a better solution yet.

At least, this code doesn't require the Lync SDK. ;-)

Here is my code snippet, I hope it helps:

void Test()
{
    int conversationWindowCount = WindowDetector.Count("LyncConversationWindowClass");
}

static class WindowDetector
{
    private delegate bool CallBackPtr(int hwnd, int lParam);

    [DllImport("user32.dll")]
    private static extern int EnumWindows(CallBackPtr callPtr, int lPar);

    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    private static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

    private static readonly object Lock = new object();

    private static int _count;
    private static string _className;

    private static bool EnumWindowsCallback(int hwnd, int lparam)
    {
        var sb = new StringBuilder(255);
        GetClassName(new IntPtr(hwnd), sb, sb.Capacity);
        string className = sb.ToString();

        if (className == _className)
        {
            _count++;
        }

        // return true to continue enumerating or false to stop
        return true;
    }

    /// <summary>
    ///     Returns the count of windows which have the specified class name.
    /// </summary>
    /// <param name="className">The window class name to look for (case-sensitive).</param>
    public static int Count(string className)
    {
        lock (Lock)
        {
            _count = 0;
            _className = className;

            EnumWindows(EnumWindowsCallback, 0);

            return _count;
        }
    }
}