This is an inbuilt function function provided by PPWIZARD.
This is a variation on the standard rexx "strip()" routine, the main difference being is that you can list all characters you wish to treat as spaces.
This routine converts all the characters you indicate in the supplied string to spaces and then performs a normal "strip()" operation. By default it strips null bytes ('00'x) and this is typically the main reason it would be called.
The function takes 1 or more parameters as follows:
The routine returns the modified string.