Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, _
 ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long

  Public Declare Function SendMessage Lib "user32" Alias "SendMessageW" _
   (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As IntPtr) As Integer
  Public Declare Function SendMessage_TBMETRICS Lib "user32" Alias "SendMessageW" _
   (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByRef lParam As TBMETRICS) As Integer
  Public Declare Function SendMessage_TBBUTTON Lib "user32" Alias "SendMessageW" _
   (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByRef lParam As TBBUTTON) As Integer
  Public Declare Function SendMessage_TBBUTTONINFO Lib "user32" Alias "SendMessageW" _
   (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByRef lParam As TBBUTTONINFO) As Integer
  Public Declare Function SendMessage_REBARBANDINFO Lib "user32" Alias "SendMessageW" _
   (ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByRef lParam As REBARBANDINFO) As Integer