Actions based on an activated cell

[USAMax]

I built a function that will pull options from the imported data. Cell B2 will always have the first option box and if there are 25 options they will continue down to B26. The next set of options will be from F2 to F26 then columns J and N depending on how many options there are.

First: How do I tie a routine to the cell that. Once the cell is selected or activated the routine needs to run.
Second: What is a good check mark to place in the cell to show that that option is active.

I am not using a User Forms or Check Boxes because this sheet has to be dynamic. The content will keep changing.

 

[USAMax]

I found a way to do what I want but I have to Double Click.

Everyone has always been amazing in the past so I do not need to take up anyone's time.


Private Sub worksheet_beforedoubleclick(ByVal Target As Range, Cancel As Boolean)
Set Target = ActiveCell
ActiveCell.Select
Cancel = True
If ActiveCell.FormulaR1C1 = "" Then
ActiveCell.FormulaR1C1 = "ü"
Else
ActiveCell.FormulaR1C1 = ""
End If
Call Prep(Target, Cancel)
End Sub

Thank you,