Closes the application's association with ICC.
    Format
      SYS$ICC_CLOSE_ASSOC  assoc_handle
    C Prototype
      int sys$icc_close_assoc  (unsigned int assoc_handle);
1 – Arguments
 assoc_handle
    OpenVMS usage:association_id
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value
    The handle of the association to be closed.