SetParameterString method

public virtual bool SetParameterString(
     ul_column_num pid,
    const char * value,
    size_t len
)

pid The 1-based ordinal of the parameter.
value The string value.
len Optional. Set to the length of the string in bytes or UL_NULL_TERMINATED_STRING if the string in null-terminated. SQLE_INVALID_PARAMETER is set if this parameter is greater than 32K. For large strings, call the AppendParameterStringChunk method instead.

True on success, otherwise false.