Text in a Window

Can I pickup the contents of a window (external to my application)? I am able to get the handle of the correct window so how can I acheive my final objecvtive?

You aren't specific, so I'll give you a general example of how to get text from Notepad and putting it into a Multiline TextBox, Text1 when you click a button, Command1.

Code:

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Option Explicit

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

Private Const WM_GETTEXT = &HD
Private Const WM_GETTEXTLENGTH = &HE

Private Sub Command1_Click()
    Dim sBuffer As String, lLength As Long, hWndNotepad As Long
   
    ' Find the Notepad Window handle
    hWndNotepad = FindWindowEx(0, 0, "Notepad", vbNullString)
    ' Find the Notepad Edit (TextBox) handle
    hWndNotepad = FindWindowEx(hWndNotepad, 0, "Edit", vbNullString)
   
    ' Get the length of the text in the Edit
    lLength = SendMessage(hWndNotepad, WM_GETTEXTLENGTH, 0, ByVal 0)
    ' Add 1 for the null-terminator
    lLength = lLength + 1
   
    ' Make room in the receiving string - it will be filled with Nulls
    sBuffer = String(lLength, vbNullChar)
   
    ' Receive the string
    Call SendMessage(hWndNotepad, WM_GETTEXT, lLength, ByVal sBuffer)
   
    ' Put it in the TextBox
    Text1.Text = sBuffer
   
    '
    ' Note: If you are feeling advanced, you can use smaller code!
    '
    ' Dim sBuffer As String, hWndNotepad As Long
    '
    ' hWndNotepad = FindWindowEx(FindWindowEx(0, 0, "Notepad", vbNullString), 0, "Edit", vbNullString)
    ' sBuffer = String(SendMessage(hWndNotepad, WM_GETTEXTLENGTH, 0, ByVal 0) + 1, vbNullChar)
    ' Call SendMessage(hWndNotepad, WM_GETTEXT, Len(sBuffer), ByVal sBuffer)
    ' Text1.Text = sBuffer
End Sub

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Sorry!

I have shelled out to MakeCab.EXE. I am looping the EnumWindows and using GetWindowText until the MakeCab window is gone. This works fine. What I would like to do is get the text within the DOS window (it has a % complete figure I'd like to use) and present it to the user.