using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Text;
using?System.Windows.Forms;

namespace?ExhibitionHall
{
????public?partial?class?FrmInputTime?:?Form
????{
????????public?FrmInputTime（）
????????{
????????????InitializeComponent（）;
????????}
????????public?int?Time;
????????public?bool?Ior;

????????private?void?btmConfirm_Click（object?sender?EventArgs?e）
????????{
????????????try
????????????{
????????????????Time?=?int.Parse（tbInput.Text）;
????????????????if?（Time?<=?500）
????????????????{
????????????????????MessageBox.Show（@“輸入出錯(cuò)，應(yīng)大于500。“?@“系統(tǒng)提示“?MessageBoxButtons.OK?MessageBoxIcon.Error）;
????????????????????Time?=?0;
????????????????????tbInput.Focus（）;
????????????