How to check the input time is in the Excel specific column or not ? AND How to substring the data in the specific column of the excel sheet?

This is my second Q in forum. How can i check the InputTime(HH:mm) is exist in exact specific column of the excel sheet.
Input StartTime From Dialog (HH:mm)
Excel data in the colum3 (yyyy/mm/dd HH:mm~HH:mm)
I don`t know how to substring the row.item(3).ToString of the excel and
the excel comes from the datascrapping and saved in the pc local, is there any step do i miss before For Each Row activity .
Sincerely, Thanks in advance.

Hi @eimon

do you mean like that

In that case you could use regex