In order to offer a meaningful input help for as many screen fields as possible, the R/3 System uses a number of mechanisms. If there is more than one such mechanism available for a field, the one that is furthest left or at the top of the above hierarchy is used.
In addition to the options described above for defining the input help of a field in the ABAP Dictionary, you can also define it in the screen field. The disadvantage, however, is that there is no automatic reuse.
With the screen event POV, you can program the input help of a field by yourself. You can adjust the design of the help to the standard help using the function modules F4IF_FIELD_VALUE_REQUEST or F4IF_INT_TABLE_VALUE_REQUEST. However, you should check to see if the part of the input help that you programmed yourself should be implemented as a search help exit instead (see Appendix).
You can also attach a search help to a screen field in the Screen Painter. There are some functional restrictions on this kind of attachment as compared with attachment in the Dictionary.
You should no longer use the input checks defined directly in the flow logic of the screen, from which it is also possible to derive input helps.
The function Technical info is offered in the hit list in the menu of the right mouse key. It can be used to find out which of the specified mechanisms is being used.
