Public Shared Function SendMessage( _
   ByVal hWnd As HandleRef, _
   ByVal msg As Integer, _
   ByVal wParam As IntPtr, _
   ByVal lParam As IntPtr _
) As IntPtr

Dim hWnd As HandleRef
Dim msg As Integer
Dim wParam As IntPtr
Dim lParam As IntPtr
Dim value As IntPtr
 
value = CustomControl.SendMessage(hWnd, msg, wParam, lParam)

public static IntPtr SendMessage( 
   HandleRef hWnd,
   int msg,
   IntPtr wParam,
   IntPtr lParam
)