Variable in signal path

You can use the indirection operator $string-expression$ to access an FlexPro object from its (path) name given as a string:

Dim Fld = "FolderA\"
$Fld : "Signal1"$

accesses the object ‘Signal1’ in ‘FolderA’ relative to the path of the formula containing the expression. Note the double backslash, it is necessary because the acts as escape character.