Solved

How to capture "Net Send" messages from Windows Messenger?

Posted on 2004-04-20
4
2,130 Views
Last Modified: 2010-05-18
Just need to capture messages coming to the user on whose system the VB program is running.  I do not need to capture messages on the entire network.

VB.NET example preferred but VB6 is ok.

Thanks for any ideas.
0
Comment
Question by:mistert006
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 28

Accepted Solution

by:
vinnyd79 earned 500 total points
ID: 10871649
This is in VB6. Try adding a Listbox and a timer.Set the Timer interval to 1000.


Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function BringWindowToTop Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long, ByVal wCmd As Long) As Long
Private Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
Const BM_CLICK = &HF5
Const WM_GETTEXTLENGTH = &HE
Private Const WM_GETTEXT = &HD

Private Sub Timer1_Timer()
Dim lWin As Long
Dim Control As Long
Dim text As String
Dim textlen As Long
lWin = FindWindow(vbNullString, "Messenger Service ")
If lWin <> 0 Then
  Control = FindWindowEx(lWin, 0, "Static", vbNullString)
      textlen = SendMessage(Control, WM_GETTEXTLENGTH, vbNull, vbNull)
      textlen = textlen + 1
  text = Space$(textlen)
  Call SendMessage(Control&, WM_GETTEXT, textlen, ByVal text)
 
  Control = FindWindowEx(lWin, 0, "Button", vbNullString)
  SendMessage Control, BM_CLICK, 0, 0
  List1.AddItem text
End If
End Sub
0
 

Author Comment

by:mistert006
ID: 10878129
I tried the program.  It does work, but I would still see the message box flash on the screen.  I would like to intercept the message so the message box from Windows Messenger service is not displayed at all.

Thank you very much.
0
 
LVL 28

Expert Comment

by:vinnyd79
ID: 10888826
You could try lowering the timer interval,but I think you might still see the message flash.I've never seen anyone successfully intercept the message box before it appears using VB.I think you would need to create a hook using a DLL written in a language like C to accomplish this.

Good Luck.
0
 

Expert Comment

by:hello_2004
ID: 11691257
I have tried the code.. it works wonderful.. but it doesn't read the other window messages specifically those that have information icon (i.e. i inside a triangle)  in it.

How to read the tetx from such a message box.

Please help I will award points for this......

Regards
Hello_2004
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

There are many ways to remove duplicate entries in an SQL or Access database. Most make you temporarily insert an ID field, make a temp table and copy data back and forth, and/or are slow. Here is an easy way in VB6 using ADO to remove duplicate row…
The debugging module of the VB 6 IDE can be accessed by way of the Debug menu item. That menu item can normally be found in the IDE's main menu line as shown in this picture.   There is also a companion Debug Toolbar that looks like the followin…
Get people started with the process of using Access VBA to control Excel using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Excel. Using automation, an Access application can laun…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question