Marco van de Voort wrote: > For variant bools it is definitely -1. There is a comment about that too > somewhere. I found <http://blogs.msdn.com/b/oldnewthing/archive/2004/12/22/329884.aspx> <http://msdn.microsoft.com/en-us/library/windows/desktop/ms221627(v=vs.85).aspx> Yet another type, VARIANT_BOOL ... Regards, Adriaan van Os