'En el form
Private Sub Form_Load()
    Dim hwndie As Long
    Me.AutoRedraw = True
    hwndie = FindWindow("IEframe", vbNullString)
    Debug.Print hwndie
    EnumChildWindows hwndie, AddressOf EnumChildProc, ByVal 0&
End Sub


'En un modulo
Declare Function GetDesktopWindow Lib "user32" () As Long
Declare Function EnumChildWindows Lib "user32" (ByVal hWndParent As Long, ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long
Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Const EM_GETLINE = &HC4

Public Function EnumChildProc(ByVal hwnd As Long, ByVal lParam As Long) As Long
    Dim lng As Long, buffer As String, num As Long
    buffer = Space(255)
    Ret = GetClassName(hwnd, buffer, 255)
    If Left$(buffer, Ret) = "Edit" Then
            'creamos un buffer
            buffer = Space(255)
            'obtenemos el texto del Edit del ie
            num = SendMessage(hwnd, EM_GETLINE, 1, ByVal buffer)
            Form1.Print Left(buffer, num)
            Exit Function
    End If
    'continue enumeration
    EnumChildProc = 1
End Function