shell函数调用应用程序，如何获取应用程序中的内容

shell函数调用应用程序，如何获取应用程序中的内容，如word，公式编辑器等 --------------------编程问答-------------------- 给一个思路：用process类或API得到窗口句柄，再取某控件的内容：
' 相关的API:
    Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
                     (ByVal lpClassName As String, _
                      ByVal lpWindowName As String) As Integer
    Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" _
                     (ByVal hwnd As IntPtr, ByVal lpString As StringBuilder, _
                      ByVal cch As Integer) As Long
    Declare Function GetWindow Lib "user32" (ByVal hwnd As Integer, _
                            ByVal wCmd As Integer) As Integer
    Declare Function PostMessage Lib "user32" Alias "PostMessageA" _
                            (ByVal hwnd As IntPtr, _
                             ByVal wMsg As Integer, ByVal wParam As Integer, _
                             ByVal lParam As Integer) As Integer

    Public Delegate Function EnumWindowsCallback(ByVal hWnd As Integer, _
                                                 ByVal lParam As Integer) As Boolean

    Declare Function EnumWindows Lib "user32" (ByVal lpEnumFunc As EnumWindowsCallback, _
                                                  ByVal lParam As Integer) As Integer

    Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Integer, _
                             ByVal lpClassName As StringBuilder, _
                             ByVal nMaxCount As Integer) As Integer  '为指定的窗口取得类名
自己慢慢试吧。
--------------------编程问答-------------------- 难.
还是建议COM引用吧.

补充：.NET技术 ,  VB.NET