NAME
        DeleteVar -- Deletes a local or environment variable (V36)

   SYNOPSIS
        success = DeleteVar( name, flags )
        D0                    D1    D2

        bool deletevar(strptr, ulong )

   FUNCTION
        Deletes a local or environment variable.

   INPUTS
        name   - pointer to an variable name.  Note variable names follow
                 filesystem syntax and semantics.
        flags  - combination of type of var to delete (low 8 bits), and
                 flags to control the behavior of this routine.  Currently
                 defined flags include:

                 GVF_LOCAL_ONLY  - delete a local (to your process) variable.
                 GVF_GLOBAL_ONLY - delete a global environment variable.

                 The default is to delete a local variable if found, otherwise
                 a global environment variable if found (only for LV_VAR).

   RESULT
        success - If non-zero, the variable was sucessfully deleted, FALSE
                  indicates failure.

   BUGS
        LV_VAR is the only type that can be global

   SEE ALSO
        getvar(), setvar(), findvar(), deletefile(), <dos/var.h>