Restricting CRMIF_ORDER_SAVE_M01 to particular activity

Hi Team,

I am configuring Basic type CRMIF_ORDER_SAVE_M01 to enable idoc for activities with custom fields.

I enhanced CRMIF_ORDER_SAVE_M01 to ZCRMIF_ORDER_SAVE_M01 using BDFG and working fine.

Now my requirment is i want to restrict generation of IDOC only for one activity not all.

Please help me how to do this?

Thanks in advance,

Vijay