FastScript supports enumerations. You can write the following in
a script:

Form1.BorderStyle := bsDialog;

Sets are not supported. However, you can use set constants in the
following way:

Font.Style := fsBold;            // Font.Style := [fsBold] in Delphi
Font.Style := fsBold + fsItalic; // Font.Style := [fsBold, fsItalic]
Font.Style := 0;                 // Font.Style := []