How to read the contents of a screen from another application [Office Communicator] - windows

Question

Knowing the hwnd of the window, how do I read the contents of this? Before anyone ask me, I'm trying to get the text that was used in the Communicator window.
Below is the code I found on the Internet.
The code is not mine.
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace EventFun
{
class EventHookUp
{
CommunicatorAPI.Messenger mCommunicator = null;
static void Main(string[] args)
{
EventHookUp hu = new EventHookUp();
hu.InitializeEventHocks();
Console.ReadKey();
}
public void InitializeEventHocks()
{
mCommunicator = new CommunicatorAPI.Messenger();
mCommunicator.OnIMWindowCreated += new CommunicatorAPI.DMessengerEvents_OnIMWindowCreatedEventHandler(mCommunicator_OnIMWindowCreated);
mCommunicator.OnIMWindowDestroyed += new CommunicatorAPI.DMessengerEvents_OnIMWindowDestroyedEventHandler(mCommunicator_OnIMWindowDestroyed);
}
void mCommunicator_OnIMWindowCreated(object pIMWindow)
{
CommunicatorAPI.IMessengerConversationWndAdvanced stpIMWindow = pIMWindow as CommunicatorAPI.IMessengerConversationWndAdvanced;
//stpIMWindow.History;
long Hwnd = (long)stpIMWindow.HWND;
Console.WriteLine("New IM Window Created : {0}", Hwnd);
CommunicatorAPI.IMessengerContacts contactList = (CommunicatorAPI.IMessengerContacts)stpIMWindow.Contacts;
StringBuilder sb = new StringBuilder();
foreach (CommunicatorAPI.IMessengerContact imc in contactList)
{
sb.Append(imc.FriendlyName);
sb.Append(Environment.NewLine);
}
Console.WriteLine(sb.ToString());
}
void mCommunicator_OnIMWindowDestroyed(object pIMWindow)
{
Console.WriteLine("IM Window Destroyed.");
}
}
}

Answer 1

It sounds like you are trying to get the conversation text history from the conversation window? If so, George Durzi has an excellent blog post on this.

Answer 2

As this blog post is not available, I used below method to retrieve the conversation history:
object obj = msgrAdv.StartConversation(
CONVERSATION_TYPE.CONVERSATION_TYPE_IM, // Type of conversation
sipUris, // object array of signin names for having multiple conversations or just a string
null,
"Test",
"1",
null);
imWindowHandle = long.Parse(obj.ToString());
if (imWindow == null) //If there is already an open window...
{
imWindow = (IMessengerConversationWndAdvanced)msgrAdv.InstantMessage(sipUris);
}
//else there was no open window, we have opened the window using "msgrAdv.StartConversation" so there is a imWindow associated which is implemented in communicator_OnIMWindowCreated.
//and then...
string history = imWindow.History;