How to set values and select one of the values among it dynamically to combo Dropdown?

questions
1

How to set values dynamically to combo Dropdown?

2

?COMBO1{PROP:From} = ‘A|B|C’

3

I need to dynamically select value

4

SELECT(?COMBO1, 2) will select ‘B’ from my 1st example.

5

If you want to change values, you can assign different values like Mike’s method;
?COMBO1{PROP:From} = ‘A|#1|B|#2|C|#3’ (A → 1, B → 2, C → 3)
?COMBO1{PROP:From} = ‘A|#5|B|#8|C|#6’ (A → 5, B → 8, C → 6)
or
?COMBO1{PROP:From} = ‘XX|#1|YY|#2|ZZ|#3’ (XX → 1, YY → 2, ZZ → 3)