Getting Text inside a window

Use the FindWindow API to get the handle of the window then use the following function to retrieve the text:

VB Code:

Public Declare Function FindWindow Lib "user32" &_
Alias "FindWindowA" (ByVal lpClassName As String, ByVal &_
lpWindowName As String) As Long
Public 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
 
Public Function GetText(Window As Long) As String
Dim Cursor As String, Text As Long
  Text& = SendMessage(Window&, WM_GETTEXTLENGTH, 0&, 0&)
  Cursor$ = String(Text&, 0&)
  Call SendMessageByString(Window&, WM_GETTEXT, Text& + 1, Cursor$)
  GetText$ = Cursor$
End Function

Here part of the code that Ive use it in my previous program and hope it make sense to you :)

VB Code:

Public Declare Function EnumChildWindows Lib "user32" (ByVal hWndParent As Long, ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long
Public Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hWnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Public Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hWnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
 
Private Sub Command1_Click()
    '//Find the Messenger Window handle
    phWnd = FindWindow(0, "Messenger Service ")
    'phWnd = FindWindow(0, "Project1")
    If phWnd > 0 Then
        '//Find the Static Window handle
        EnumChildWindows phWnd, AddressOf EnumChildProc, ByVal 0&
    End If
End Sub
 
Public Function EnumChildProc(ByVal hWnd As Long, ByVal lParam As Long) As Long
    Dim tmp As String
    Dim wClass As String
    Dim Buff As String
    
    '//Get the Child Class Name
    tmp = String(260, Chr(0))
    GetClassName hWnd, tmp, 260
    p1 = InStr(1, tmp, Chr(0), vbTextCompare)
    If p1 > 0 Then
        wClass = Left$(tmp, p1 - 1)
        '//compare the class name
        If StrComp(UCase(wClass), "STATIC", vbTextCompare) = 0 Then
            '//Continue retrieve the Message
            Buff = Space$(GetWindowTextLength(hWnd) + 1)
            GetWindowText hWnd, Buff, Len(Buff)
            
            '//Display the text
            Buff = Left$(Buff, Len(Buff) - 1)
            MsgBox Buff
 
            Exit Function
        End If
    End If
 
    '//Continue enumeration
    EnumChildProc = 1
End Function