BDC code inside a method in a BADI implementation.?

Hi,

How do we use BDC code inside a BADI?

I have tried to call a transaction and pasted the code inside a method PROCESS_CUSTOMER_UI_FUNCTIONS.

It gives error " FORMS cannot be used in class pools.For this reason there are no PERFORM statements for internal FORMS."

Pease give me suggestions or alternative for the same.

Thanks in advance.