如何用vb给qq发送消息

可参考以下：
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) 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 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 Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)
Private Const WM_GETTEXT = &HD
Private Const EM_REPLACESEL = &HC2
Private Const BM_CLICK = &HF5

Private Function GetWinText(ByVal WinHwnd As Long) As String
Dim lLen As Long
GetWinText = String(255, Chr(0))
lLen = SendMessage(WinHwnd, WM_GETTEXT, Len(GetWinText), ByVal GetWinText)
GetWinText = Left(GetWin