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                             handle_ishandle

   Usage
   #include <handle.h>
   int handle_ishandle(void __handle *hptr);

   Description
   Tests  whether  hptr is a true __handle pointer or a far  pointer.  If
   there  is  no EMS memory present __handle pointers  default  to  being
   normal pointers. Implemented as a macro in handle.h.

   Return Value
   1 if hptr is a __handle pointer otherwise 0.