No, you can't use 'Option Buttons' on cells without the Userform to the best of my knowledge.
However, You can SIMULATE 'Option Buttons' by using Shapes, and assign macros to the shapes.
See the attached workbook written and tested using Excel 2003, which I expanded to 3 Simulated Option Buttons, and uses code very
similar to what existed with the Userform.
In the 'ThisWorkbook' module an optional initialization can be used:
I arbitrarily divided the rest of the code into two modules:
ModSimulatedOptionButtons - which simulates the Option Buttons and interfaces with the Worksheet.
ModConvert - which contains code similar the original.
Code for ModSimulatedOptionButtons follows:
Code for ModConvert follows:
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