title: Is there a TSO command written in REXX or CLIST that can determine WHO has enqueued a dataset?
body: <p>I need to write a REXX Exec or Clist to identify WHO has enqueued a Dataset and display a user friendly message on an ISPF dialog application.  Due to system configuration issues, the %WHOHAS command is not available.  However I also know that ISPF itself (Option 3.4) has proprietary hooks into the zos mainframe to display the enqueued resource information I need - so the infomation can be obtained. Unfortunately I don't know how to access this data from outside ISPF 3.4 using a REXX Exec or CLIST.  Any suggestions?</p>