Date/Month Related Function Modules:
DATE_COMPUTE_DAY – Finds day of the month
DATE_CONV_EXT_TO_INT  - user formatted date is converted to system date
DATE_GET_WEEK  - convert date into year + week format
DATE_TO_DAY – gives weekday from date
DATE_IN_FUTURE – takes number of days and date  - gives future date in user format and system format
MONTH_PLUS_DETERMINE – add or subtract month from a date
RP_CALC_DATE_IN_INTERNAL – add/subtract year/month/days from a date
WEEK_GET_FIRST_DAY – take input as YYYYWW and it gives first day of the week.
MONTH_NAMES_GET – language is only parameter. Returns internal table with months.
MONTH_PLUS_DETERMINE – subtract months from date
Popup Related Function Modules:
POPUP_TO_DISPLAY_TEXT – display 2 line text.
POPUP_TO_CONFIRM_STEP
POPUP_TO_CONFIRM_WITH_VALUE (with Back and Exit)
POPUP_TO_CONFIRM_LOSS_OF_DATA (with Cancel). 
POPUP_TO_CONFIRM_WITH_MESSAGE
POPUP_TO_DECIDE
POPUP_TO_DECIDE_WITH_MESSAGE


Serkan AKKAVAK
Computer Engineer
ABAP Developer & SAP MM SD Consultant
Contact : serkurumsal@yandex.com