All statements for the preprocessor such as pragmas, options, includes must always be placed on a separate line so that they can be handled correctly. Leading spaces and tabs are ignored. It is however possible to comment them out ad-hoc.
Single-line comments are initiated for all preprocessor instructions with // - analogous to C/C++/C#. Multiline comment blocks are not supported in the preprocessor.
Since formula parameters within a List & Label expression are marked with either ' or ", their use within a script is restricted if the source code is embedded directly into the formula. Then only the other character within the source code, which was not used to introduce the formula parameter, can be used for masking in the source code. However, if the source code is loaded from an external file instead using the LoadFile$() designer function, this restriction does not apply.