Yes.
You can achieve it through PCR. In your schema you can see under time management subschema you will get the your leave encashment infotypes processing funtion. After that you can place your pcr.
To achieve this you also configure the leave encashment calculation procedure in SAP with the link of your leave encashment wage type.
The function of IT467 will bring that leave encashment no in the ZL table and from there you will pick that value execute for the result through your custom PCR.
Check and tell me.
Regards,
Sankarsan