Try to convert AnsiString to 64-bit integer.

You can find more information in comments below.

/**
    Try convert ansi string to Int64 
    @param str Ansi string 
    @param[out] out Reference to 64-bit integer where to store result of conversion 
    @return True if conversion succeeded, otherwise - false 
    */
    bool TryAnsiToInt64(const AnsiString &str, long long &out);