两个例子的区别！

我比较了一下在UsbTherm和用driverworks生成的一个空的usb程序中，在creat例程中有点不同，在usbtherm中为：
NTSTATUS UsbThermometer::Create(KIrp I)
{
I.ForceReuseOfCurrentStackLocationInCalldown();
NTSTATUS status = m_Usb.PnpCall(this, I);

CurrentIrp() = NULL;

return status;
}

而在driverworks 生成的usb中为：
status = I.PnpComplete(this, STATUS_SUCCESS, IO_NO_INCREMENT);

而它把
I.ForceReuseOfCurrentStackLocationInCalldown();
NTSTATUS status = m_Usb.PnpCall(this, I);
这两项给注释掉了。为什么？难道他们会有一样的creat效果吗？

关注!

老兄!差点被你搞晕掉!
你没有看Numega的注释吗?
// Generally a create IRP is targeted at our FDO, so we don't need
// to pass it down to the PDO.  We have found for some devices, the
// PDO is not expecting this Irp and returns an error code.
// The default wizard code, therefore completes the Irp here using
// PnpComplete().  The following commented code could be used instead
// of PnpComplete() to pass the Irp to the PDO, which would complete it.
//
我当时看到这句,就直接用的PnpComplete,没有试过把IRP传下去.