If this page was compiled from a .csp file, then this parameter contains the filename used for compilation.

This parameter is used to make sure that if multiple CSP applications are mapped to the same namespace that the CSP engine can correctly identify which class corresponds with which URL. If 'LockCSPName' is true (the default, defined in the CSP application) then you can only access this page if the url exactly matches this 'CSPURL'. You can set this parameter to "" if you wish to disable this check for this class. This check is applied for all CSP urls (cls/csp/zen).
If this page was compiled from a .csp file, then this parameter is automatically set to contain the url of this file used for compilation.

Event handler for PAGE event: this is invoked in order to generate the content of a csp page.