The Enable or Disable Decimal Overflow Detection routine enables
    or disables decimal overflow detection for the calling routine
    activation. The previous decimal overflow setting is returned.

    This routine is available on OpenVMS Alpha and I64 systems in
    translated form and is applicable to translated VAX images only.

    Format

      LIB$DEC_OVER  new-setting

1  –  Returns

    OpenVMS usage:longword_unsigned
    type:         longword integer (unsigned)
    access:       write only
    mechanism:    by value

    The old decimal overflow enable setting (the previous contents of
    SF$W_PSW[PSW$V_DV] in the caller's frame).

2  –  Argument

 new-setting

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

    New decimal overflow enable setting. The new-setting argument is
    the address of an unsigned longword that contains the new decimal
    overflow enable setting. Bit 0 set to 1 means enable; bit 0 set
    to 0 means disable.