CitectSCADA Variable Argument Syntax

Hello All,

Does anybody know the correct syntax for the following:-

I have a genie with variable A getting passed in
I want to use this as a prefix for a variable address to send to a function.

function ( %A% + _variable)
(_variable being the rest of the address)

So if genie variable A was 05 the tag value sent to the function would be 05_variable.

Also, I would like to off set the A variable by 4

So

function ( %A% - 4 + _variable)

so would actually send value from 01_variable if the genie A was 5.

Hope that makes sense, any help would be greatly appreciated as I've being trying various different ways and cant get it to work.

Thanks,
Tom