How do I add these custom fields to postbit?

[afmarko99]

I want to add custom fields in the postbit like this forum:

http://www.stockrants.com/forum/showthread.php?t=11097

See attached image for reference.

[ZUCCO]

https://vborg.vbsupport.ru/showthread.php?t=269581

or

https://vborg.vbsupport.ru/showthread.php?t=250418

:D

[afmarko99]

Thanks