VB.NET SendMessage() KeyStrokes.

[abhishek009]

Hi,

I have opened the NotePad and I want to send key strokes using SendMessage. I have got parent and child window and tried to send keystrokes using SendMessage() but didn't work. Why ? As far as I know the code is correct.

 Const WM_KEYDOWN As Integer = &H100
        Const WM_KEYUP As Int32 = &H101
        Const VK_RETURN As Integer = &HD

        Dim hWnd_notepad As IntPtr = FindWindow(Nothing, "Untitled - Notepad")
        Dim hWnd_notepad_class As IntPtr = FindWindowEx(hWnd_notepad, Nothing, "Edit", Nothing)


        SendMessage(hWnd_notepad_class, WM_KEYDOWN, VK_RETURN, 0)
        SendMessage(hWnd_notepad_class, WM_KEYUP, VK_RETURN, 0) 

Any help would be appreciated.
Thanks!