NTSTATUS
MyCallDriver(
    IN PDEVICE_OBJECT DeviceObject,
    IN OUT PIRP Irp, PDRIVER_DISPATCH Dispatch)
{

    PIO_STACK_LOCATION IrpSp;
    PDRIVER_OBJECT DriverObject;
    NTSTATUS Status;

    Irp->CurrentLocation--;

    IrpSp = IoGetNextIrpStackLocation( Irp );
    Irp->Tail.Overlay.CurrentStackLocation = IrpSp;

   
    IrpSp->DeviceObject = DeviceObject;

    DriverObject = DeviceObject->DriverObject;

        if(Dispatch == NULL){
                Status = DriverObject->MajorFunction[IrpSp->MajorFunction]( DeviceObject, Irp );
        }else{
                Status = Dispatch( DeviceObject, Irp);
        }

    return Status;
}
我想问一下
Status = DriverObject->MajorFunction[IrpSp->MajorFunction]( DeviceObject, Irp );
这一句是怎么意思呀?先谢过各位大侠了

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