$CANTIM

   Cancels all or a selected subset of the Set Timer requests
   previously issued by the current image executing in a process.
   Cancellation is based on the request identification specified
   in the Set Timer ($SETIMR) service. If you give the same request
   identification to more than one timer request, all requests with
   that request identification are canceled.

   Format

     SYS$CANTIM  [reqidt] ,[acmode]

   C Prototype

     int sys$cantim  (unsigned __int64 reqidt, unsigned int acmode);
 

Additional information available:

Arguments