Vb.net 如何获取不直接打印的打印机列表？

我需要一个不直接打印的打印机列表。获得一份直接打印的列表似乎相当容易。但如何做相反的事情呢

    Dim PrintServer As New SysPrint.PrintServer
    Dim arrFlags(0) As SysPrint.EnumeratedPrintQueueTypes
    arrFlags(0) = System.Printing.EnumeratedPrintQueueTypes.DirectPrinting
    Dim QColl As SysPrint.PrintQueueCollection = PrintServer.GetPrintQueues(arrFlags)

MSDN说EnumeratedPrintQueueTypes有一个FlagsAttribute属性，允许其成员值按位组合。因此，我应该能够以某种方式指定NOT direct。我该怎么做

我尝试执行此操作

arrfags（0）=而不是System.Printing.EnumeratedPrintQueueTypes.DirectPrinting

，但没有返回任何结果。显然不正确

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那么，如何操作flags属性以消除所有直接打印的打印机？

这是一种方法，但似乎非常不雅观：

    'get full list
    Dim PrintServer As New SysPrint.PrintServer
    Dim QColl As SysPrint.PrintQueueCollection = PrintServer.GetPrintQueues()

    'get those not printing direct 
    Dim Qcoll2 As List(Of SysPrint.PrintQueue) = QColl.Where(Function(x) Not (x.IsDirect)).ToList

    'select name only
    Dim strList As List(Of String) = Qcoll2.Select(Function(x) x.Name).ToList