NAME
        SetVar -- Sets a local or environment variable (V36)

   SYNOPSIS
        success = SetVar( name, buffer, size, flags )
        D0                 D1     D2     D3    D4

        bool setvar(strptr, strptr, long, ulong )

   FUNCTION
        Sets a local or environment variable.  It is advised to only use
        ASCII strings inside variables, but not required.

   INPUTS
        name   - pointer to an variable name.  Note variable names follow
                 filesystem syntax and semantics.
        buffer - a user allocated area which contains a string that is the
                 value to be associated with this variable.
        size   - length of the buffer region in bytes.  -1 means buffer
                 contains a null-terminated string.
        flags  - combination of type of var to set (low 8 bits), and
                 flags to control the behavior of this routine.  Currently
                 defined flags include:

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

                The default is to set a local environment variable.

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

   BUGS
        LV_VAR is the only type that can be global

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