Removes all nonprintable characters from text. Use CLEAN on text imported from other applications that contains characters that may not print with your operating system. For example, you can use CLEAN to remove some low-level computer code that is frequently at the beginning and end of data files and cannot be printed.

'Declaration
 
Public Class CalcCleanFunction 
   Inherits CalcBuiltinFunction

'Usage
 
Dim instance As CalcCleanFunction

public class CalcCleanFunction : CalcBuiltinFunction