In my option group InteractiveChange() event, I check a certain condition. If it's true, I present a message box to the user. If the user click on "No", I put back the old value in the option group Value propriety.

Question 1:
If Value = 1 and the user click on the third option, everyting work fine (Value still 1 and the button is depressed)

If Value = 3 and the user click on the second option, Value get a zero value (where it should be 3)

The actual line of code:
THISFORM.OptionGroup.Value = THISFORM.OldValue (added form property)

In debug, THISFORM.OldValue = 3 but right after that line of code, THISFORM.OptionGroup.Value = 0. Where did that come from?

Question 2:
Is there a way of not executing the Click() event of an option depending on certain condition? Actually, I put a check at the top of the Click() event and RETURN, but I would like to avoid entering the Click() event at all instead of repeating the code in each option Click() event.