NTSTATUS NTAPI AfdSetContext(PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
NTSTATUS NTAPI AfdGetContextSize(PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
NTSTATUS NTAPI AfdGetContext(PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)