Update wagetype amount on Infotype 0008 via user-exit
I'm trying to update the wagetype amount on Infotype 8 during PAI using EXIT_SAPFP50M_002. I'm successfully changing the value of I0008-betxx but the value is not reflected on the screen. The corresponding screen field is Q0008-betrg.
Structure Q0008 does not exist as a parameter to this function module so how should this field be updated?
Another post suggested to use FM FC_SET_DYNPRO_SET_VALUES to update the screen values but shouldn't this be handled by the SAP standard module pool?
Any examples will be appreciated.