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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 Const WM_GETTEXT = &HD
Private Const WM_GETTEXTLENGTH = &HE
Private Declare Function WindowFromPoint Lib "user32" (ByVal xPoint As Long, ByVal yPoint As Long) As Long
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" (ByVal hwnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long

Private Type POINTAPI
        X As Long
        Y As Long
End Type
Private Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal X As Long, ByVal Y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long



Private Sub Form_Load()
SetWindowPos Me.hwnd, -1, 0, 0, 0, 0, 3
End Sub

Private Sub Timer1_Timer()
Dim Cursor As POINTAPI
    GetCursorPos Cursor
      Text1.Text = Cursor.X & "," & Cursor.Y
      Dim Hnwd As Long
      Hnwd = WindowFromPoint(Cursor.X, Cursor.Y)    '当前指针句柄
       
        Text2.Text = Hnwd
        Dim longs As Long
        longs = SendMessage(hwnd, WM_GETTEXTLENGTH, 0, 0)
         
          Dim Data As String
          Data = String(longs, 0)
           
            SendMessage Hnwd, WM_GETTEXT, longs + 1, ByVal Data
           
            Text3.Text = Data
End Sub