drive.BurnIsoAudioCD problem

Hello All,

I am new to .net,I am burning CD with Nero com and VB.net

after using the following command CD burn process starts…

drive.BurnIsoAudioCD("", “Orders”, 0, isotrack, Nothing, Nothing, NERO_BURN_FLAGS.NERO_BURN_FLAG_DETECT_NON_EMPTY_CDRW Or NERO_BURN_FLAGS.NERO_BURN_FLAG_WRITE Or NERO_BURN_FLAGS.NERO_BURN_FLAG_DISABLE_EJECT, 0, NERO_MEDIA_TYPE.NERO_MEDIA_CD)

after successful burning i want to close the application but it is showing that some processes are running,

I have to forcefully stop from debugging button.

Tell me how to stop the drive.BurnIsoAudioCD method after burnning.