DavidBo - 2020-05-20

I am using a TextList where the ID is set to a name like timeID, volumeID or continousID. However if these names don't represent an integer, I cannot use the TextList in a "ComboBox for integers".
A ComboBox for integers requires IDs like 0,1,2. So my question is how can I assign 0 to timeID and 1 to volumeID?