With a little care it can be done. I think you want $Count to provide the digit appended to the end of the variable name?
Set Variable [ $Dummy ; Value : Evaluate ( "Let ( $Var" & $Count & " = value x ; True ) " ) ]
Will assign True (1) to $Dummy, but creates a variable and assigns a value to it as a side effect of the same calculation.
Note: quotes and & have to be used carefully in the above example to create the correct expression as text so that Evaluate can then correctly evaluate it.
Is array still available. I remember a long time ago doing something with arrays that peformed a similar function.
Brilliant! I really got stuck in this. Thanks a lot!