for example, the default filename is
FileA_P10.xlsx the P10 mean the month. and i want to give a freedom to user to amend or change the filename.
hence, i put the interface text box to show the default text built by formula, but it only able to input text only.
from this > "FileA_P10.xlsx"
to this > "FileA_P" + datetimeformat(datetimetoday,"%m") + ".xlsx"
and it is better if it apply for other interface tool.