Don't want "beep beep" with _message_box

[Graeme]

beta 6 on Win 7
I want to display some information in a message box without any audible annunciation.  For some reason the first message box below emits beep beep and the second one is silent.  Is a message-box always supposed to make a sound ??

Code: [Select]

_command void gptest() name_info(',')
{
   _message_box("hi", "ttt", MB_OK|MB_ICONINFORMATION);
   _message_box("hi", "ttt", MB_YESNO|MB_ICONQUESTION);
}