For selecting the values from data table follow the below steps:
1. Set the current row from which you need to get the value using the statement - DataTable.SetCurrentRow(<enter the current row value>)
2. Get the column dfrom which you need the value using the statement - DataTable.Value("<Column Name">,"<Sheet Name>")
For Example:- If you need the value from the Column Name "Test" and the row number 5 in the sheet named "Global", Use the below code:
Using this statement you will get the value from 5th row in the column named Test.
I assumes this helps you!!