首先你要清楚，你调用的例程是ndis4的还是ndis5的

从代码来看，NdisMInitializeWrapper和NdisTerminateWrapper应该NDIS4、5都要用到。

假定是NDIS5，PtUnload里没有NdisTerminateWrapper(NdisWrapperHandle, NULL);还是和DriverEntry里的相悖。

MSDN有云

Remarks

From its DriverEntry function, a miniport driver calls NdisMInitializeWrapper to notify NDIS that the driver is about to register itself as a miniport driver. After NdisMInitializeWrapper successfully returns, the miniport driver calls either NdisMRegisterMiniport or NdisIMRegisterLayeredMiniport to register its entry points with NDIS.

If a miniport driver's call to NdisMRegisterMiniport or NdisIMRegisterLayeredMiniport does not return NDIS_STATUS_SUCCESS, the miniport driver must call NdisTerminateWrapper. Calling NdisTerminateWrapper causesNDIS to clean up the resources that it allocated when the miniport driver called NdisMInitializeWrapper.

那PtUnload里应该调用NdisTerminateWrapper，示例忘了