Confirming TO with 2-step confirmation using L_TO_CONFIRM

I have been using function module L_TO_CONFIRM in several programs with good results, but now I have a scenario where 2-step confirmation is enabled, which means that the TO is confirmed in two steps (with manual confirmation using LT12 you first confirm the "pick" and then in a second confirmation the "transfer").

I have not found a way to do this with L_TO_CONFIRM. The documentation (long text for structure LTAP_CONF) talks about many variants, and even mentions 2-step confirmations in connection with TO splitting, but it never explains how to actually perform the 2-step confirmation. Anyone that has any experience with this? Useful answers will of course be rewarded.

/Leif