If you've been working hard on a game, the chances are that you don't want people to just take a quick peek through the code to get at the solutions. The way around this is to compile your ASL script into a CAS (Compiled Adventure Script) file. If viewed in a text editor, hex editor, etc. this appears as meaningless rubbish - no text is viewable. Quest, however, can decrypt these files and execute them, just as it does with ASL files.
To convert an ASL file to a compiled CAS file, you need to use the QCOMPILE.EXE utility. Run this program, click Browse to find the ASL file you wish to compile, choose a CAS filename (the default is the same name as the ASL file but with the .CAS extension), then click Compile. Depending on the speed of your PC and the size of the ASL file, the compile could take anything between a few seconds and a minute or so.
See the QCompile Manual for more information.