Deleting Locked Transactions from SM12 programmatically

HI,

If a user is editing a particular transaction(Service ticket ST) and in this process if the particular transactions hangs or if the user is not following the correct process, this particular transaction gets locked for that particular user.

Please suggest me which are the methods and function modules i can use to delete the entries in SM 12 programmatically.

Thanks in advance.

Warm Regards,

Mathew.