default

/*
 *  call-seq:
 *     WIN32OLE_PARAM#default
 * 
 *  Returns default value. If the default value does not exist, 
 *  this method returns nil.
 *     tobj = WIN32OLE_TYPE.new('Microsoft Excel 9.0 Object Library', 'Workbook')
 *     method = WIN32OLE_METHOD.new(tobj, 'SaveAs')
 *     method.params.each do |param|
 *       if param.default
 *         puts "#{param.name} (= #{param.default})"
 *       else
 *         puts "#{param}"
 *       end
 *     end
 *
 *     The above script result is following:
 *         Filename
 *         FileFormat
 *         Password
 *         WriteResPassword
 *         ReadOnlyRecommended
 *         CreateBackup
 *         AccessMode (= 1)
 *         ConflictResolution
 *         AddToMru
 *         TextCodepage
 *         TextVisualLayout
 */
static VALUE foleparam_default(self)
    VALUE self;
{
    struct oleparamdata *pparam;
    Data_Get_Struct(self, struct oleparamdata, pparam);
    return ole_param_default(pparam->pTypeInfo, pparam->method_index,
                             pparam->index);
}