Library /sys$common/syshlp/dbg$help.hlb DEBUG, Language Support, SCAN, Examining and Depositing, STRING Variables  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    If you deposit into a FIXED STRING variable, truncation will
    occur if the deposited string is longer than the size established
    by the declaration of that variable.

    If you deposit into a VARYING STRING variable, truncation will
    occur if the deposited string is longer than the maximum size
    established by the declaration of that variable.

    If you deposit into a DYNAMIC STRING variable, truncation will
    occur if the deposited string is longer than the current size of
    the variable.

    With FIXED and DYNAMIC STRING variables, if the deposited string
    is shorter than the current size of the variable, the unfilled
    portion of the variable will be blank padded to the right, with
    the new string left justified in the variable.

    In the case of VARYING STRING variables, the current size of
    the variable storage space will be adjusted to the size of the
    deposited string.