How to get DDIC information when building your fieldcatalog manually

Hi guys!
I try to build ma alv fieldcatalog manually. For each field i want to set a DDIC Dataelement.
I tried this way.
Data:
lt_fcat type lvs_t_fcat,
ls_fcat type lvs_s_fcat,
ls_fcat-ref_field = 'ZZ_MY_DATAELEMENT'
*... and some other information
append ls_fcat to lt_fcat
...but it's not working the the column text is provided by the data_element.
I know about the lvc_fieldcatalog_merge function, but i need to find a way to do this manually!
thanks for your help

hI
There are field for the short, medium an long text too, are't there?
SCRTEXT_L
SCRTEXT_M
SCRTEXT_S
Max

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