How to split a Text field using a delimiter and gather values

I've done this easily with VB.Net but struggling here.

I have a report field on this Crystal Report that is a Text field.

This text field will hold two values seperated by a comma.  In certain cases, this field may be null or not have a comma also.

I need to gather the value prior to the comma with a Crystal Formula if a comma exists in the text field.

Here's my attempt:

Local StringVar result;
Local StringVar Array resultArray;
resultArray = Split ({MC_PurchaseOrder_TTX.Note_Text}, ",");
result := resultArray(1)

Thanks for the assistance.