FPY1 will be running on background for definitely (unless debug mode), is it correct ?
Now I am facing a problem. If I need to execute it in payment mode Credit Card, I need the "enter credit card data" interface to be prompt out. However, running FPY1 is background is impossible to trigger the call out screen on entering credit card data.
So, is it there is no possibility for me to get the credit card data from user input? is it any other user exit for me to modify the 'Payment Data' tab in order to get those credit card info ?
Thanks for the helps in advance.

Cheers,
Isaac.