The Copy a Source String Passed by Descriptor to a Destination
    String routine copies a source string to a destination string.
    Both strings are passed by descriptor.

    Format

      OTS$SCOPY_DXDX  source-string ,destination-string

1  –  Corresponding JSB Entry Point

      OTS$SCOPY_DXDX6

2  –  Returns

    OpenVMS usage:word_unsigned
    type:         word (unsigned)
    access:       write only
    mechanism:    by value

    Number of bytes not moved to the destination string if the length
    of source-string is greater than the length of destination-
    string. The value is 0 (zero) otherwise.

3  –  Arguments

 source-string

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor

    Source string. The source-string argument is the address of a
    descriptor pointing to the source string. The descriptor class
    can be unspecified, fixed length, dynamic, scalar decimal, array,
    noncontiguous array, or varying.

 destination-string

    OpenVMS usage:char_string
    type:         character string
    access:       write only
    mechanism:    by descriptor

    Destination string. The destination-string argument is the
    address of a descriptor pointing to the destination string. The
    class field determines the appropriate action.