variadic parameter in DLL func. Better example

[Bjoern]

Hi,
I hope that I can write a small utility DLL which offers support for :

BinaryOrPlus(WS_TABSTOP, WS_CHILD, WS_CLIPSIBLINGS)

Why ? Because my 4GL has no binary OR operator (just a function) so this 
code fragment will not work :

x is unsigned int = WS_TABSTOP | WS_CHILD | WS_CLIPSIBLINGS    // etc.

Instead I have to use :
(BinaryOr(BinaryOr(WS_TABSTOP , WS_CHILD), WS_CLIPSIBLINGS)  // stinks !

I hope it is possible to create something similar to :

// yep this would be smart, but ...
export extern (Windows) uint BinaryOrPlus(uint...)
{
   uint result = _arguments[0];
   for (int i = 1; i < _arguments.length; i++)
   {
      result |= _arguments[i];
   }
   return result;
}

...Unfortunately Error msg is :

C:\dmd\projects\bsdutil>dmd -profile -odc:\dmd\projects\bsdutil\obj 
-ofBSDUTIL.D
LL bsdutil.d demangle.d bsdutil.def
bsdutil.d(110): Error: undefined identifier _arguments
bsdutil.d(110): Error: _arguments must be an array or pointer type, not int

Same result in case that I use :
================================

export extern (Windows) uint BinaryOrPlus(uint firstarg, ...)
{
   uint result = firstarg; //_arguments[0];
   for (int i = 1; i < _arguments.length; i++)
   {
      result |= *cast(uint *)_argptr;
	    _argptr += uint.sizeof;
   }
   return result;
}

????*$ Use Tango Bjoern