I came up with this function while trying to validate a filename for a script.  The function will take a string and a list of characters to look for and will return true if the string contains one or more of those characters.  An example would be looking for \/:*?"<>[]| as these characters should not appear in a filename, so if they exist the filename is not valid.  You would call it in the following way:

checkForSpecialChar(newFilename, "\/:*?""<>[]|")

A common problem with IDEAScript is there is no easy way to select multiple files or fields.  This script shows you one way of performing this operation.  This is a working example script.  It has a main menu that allows you to open the listbox dialog.  The main menu also allows you to select which type of fields you want to display, when you select ok you will have a message box of the fields that you selected.  You can download the code.

This snippet will check if a file or directory exists.  It returns true or false and you send the full pathname and filename.  I adapted this snippet from one I found at http://www.vbaexpress.com/kb/getarticle.php?kb_id=559