Arguments

 

enable-mask

   OpenVMS usage:mask_longword
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference

   Bit mask indicating for which control characters LIB$ENABLE_
   CTRL is to enable interception. The enable-mask argument is the
   address of an unsigned longword containing this bit mask. Each
   of the 32 bits corresponds to one of the 32 possible control
   characters. If a bit is set, the corresponding control character
   is intercepted by the CLI. Currently, only bits 20 and 25,
   corresponding to Ctrl/T and Ctrl/Y, are recognized.

   The following mask is defined in symbol libraries supplied by VSI
   to specify the value of enable-mask:

   Symbol          Hex Value     Function

   LIB$M_CLI_      %X'00100000'  Enables Ctrl/T
   CTRLT
   LIB$M_CLI_      %X'02000000'  Enables Ctrl/Y
   CTRLY

   If a set bit does not correspond to a character that the CLI can
   intercept, an error is returned.
 

old-mask

   OpenVMS usage:mask_longword
   type:         longword (unsigned)
   access:       write only
   mechanism:    by reference

   Previous bit mask. The old-mask argument is the address of an
   unsigned longword containing the old bit mask. The old bit mask
   is of the same form as enable-mask.