public bool InputString([ByRef] IVariable resut, IValue prompt = null, IValue len = null, IValue multiline = null)
        {
            string input;
            bool   inputIsDone;

            string strPrompt = null;
            int    length    = 0;
            bool   flagML    = false;

            if (prompt != null)
            {
                if (prompt.DataType != DataType.String)
                {
                    throw RuntimeException.InvalidNthArgumentType(2);
                }

                strPrompt = prompt.AsString();
            }

            if (len != null)
            {
                if (len.DataType != DataType.Number)
                {
                    throw RuntimeException.InvalidNthArgumentType(3);
                }

                length = (int)len.AsNumber();
            }

            if (multiline != null)
            {
                if (multiline.DataType != DataType.Boolean)
                {
                    throw RuntimeException.InvalidNthArgumentType(4);
                }

                flagML = multiline.AsBoolean();
            }

            inputIsDone = ApplicationHost.InputString(out input, strPrompt, length, flagML);

            if (inputIsDone)
            {
                resut.Value = ValueFactory.Create(input);
                return(true);
            }
            else
            {
                return(false);
            }
        }
        public bool InputString([ByRef] IVariable resut, int len = 0)
        {
            string input;
            bool   inputIsDone;

            inputIsDone = ApplicationHost.InputString(out input, len);

            if (inputIsDone)
            {
                resut.Value = ValueFactory.Create(input);
                return(true);
            }
            else
            {
                return(false);
            }
        }