这是一个用VB编写的在线考试系统

				VERSION 5.00
				Begin VB.Form Form1 
				   Caption         =   "输入准考号"
				   ClientHeight    =   3015
				   ClientLeft      =   5370
				   ClientTop       =   2985
				   ClientWidth     =   4905
				   LinkTopic       =   "Form1"
				   ScaleHeight     =   3015
				   ScaleWidth      =   4905
				   StartUpPosition =   2  '屏幕中心
				   Begin VB.Timer Timer1 
				      Enabled         =   0   'False
				      Interval        =   1000
				      Left            =   4440
				      Top             =   2160
				   End
				   Begin VB.CommandButton Command2 
				      Caption         =   "退出"
				      Height          =   375
				      Left            =   2160
				      TabIndex        =   7
				      Top             =   2400
				      Width           =   1215
				   End
				   Begin VB.CommandButton Command1 
				      Caption         =   "确定"
				      Enabled         =   0   'False
				      Height          =   375
				      Left            =   360
				      TabIndex        =   6
				      Top             =   2400
				      Width           =   1095
				   End
				   Begin VB.TextBox Text3 
				      Enabled         =   0   'False
				      Height          =   375
				      Left            =   1320
				      TabIndex        =   5
				      Top             =   1560
				      Width           =   2415
				   End
				   Begin VB.TextBox Text2 
				      Height          =   375
				      Left            =   1320
				      MaxLength       =   12
				      TabIndex        =   3
				      Top             =   960
				      Width           =   2415
				   End
				   Begin VB.TextBox Text1 
				      Height          =   375
				      Left            =   1320
				      MaxLength       =   12
				      TabIndex        =   1
				      Top             =   480
				      Width           =   2415
				   End
				   Begin VB.Label Label3 
				      Caption         =   "考生姓名: "
				      Height          =   375
				      Left            =   120
				      TabIndex        =   4
				      Top             =   1680
				      Width           =   1095
				   End
				   Begin VB.Label Label2 
				      Caption         =   "确认准考号:"
				      Height          =   375
				      Left            =   120
				      TabIndex        =   2
				      Top             =   1080
				      Width           =   1215
				   End
				   Begin VB.Label Label1 
				      Caption         =   "输入准考号:"
				      Height          =   375
				      Left            =   120
				      TabIndex        =   0
				      Top             =   480
				      Width           =   1215
				   End
				End
				Attribute VB_Name = "Form1"
				Attribute VB_GlobalNameSpace = False
				Attribute VB_Creatable = False
				Attribute VB_PredeclaredId = True
				Attribute VB_Exposed = False
				Option Explicit
				Private Sub Command1_Click()
				On Error Resume Next
				MkDir App.Path & "\student\" & Text1.Text
				If Err.Number = 0 Then
				On Error GoTo 0
				MkDir App.Path & "\student\" & Text1.Text & "\data"
				Else
				kaonull = 1
				On Error GoTo 0
				Err.Number = 0
				End If
				Form1.Visible = False
				Form3.Visible = True
				Timer1.Enabled = True
				End Sub
				
				Private Sub Command2_Click()
				start.Winsock1.Close
				End
				End Sub
				Private Sub Form_Unload(Cancel As Integer)
				End
				End Sub
				
				Private Sub Text1_KeyUp(KeyCode As Integer, Shift As Integer)
				If Text1.Text = "" Or Text1.Text = vbNullString Then Exit Sub
				If Right(Text1.Text, 1) > "9" Or Right(Text1.Text, 1) < "0" Then
				Text1.Text = Left(Text1.Text, Len(Text1.Text) - 1)
				Text1.SelStart = Len(Text1.Text)
				Exit Sub
				End If
				If Len(Text1.Text) = 12 Then
				If Text1.Text = Text2.Text Then
				start.Winsock1.SendData "username" & Text1.Text
				Else
				Text2.SetFocus
				End If
				End If
				End Sub
				
				Private Sub Text2_KeyUp(KeyCode As Integer, Shift As Integer)
				If Text2.Text = "" Or Text2.Text = vbNullString Then Exit Sub
				If Right(Text2.Text, 1) > "9" Or Right(Text2.Text, 1) < "0" Then
				Text2.Text = Left(Text2.Text, Len(Text2.Text) - 1)
				Text2.SelStart = Len(Text2.Text)
				Exit Sub
				End If
				If Len(Text2.Text) = 12 Then
				If Text1.Text = Text2.Text Then
				start.Winsock1.SendData "username" & Text1.Text
				End If
				End If
				End Sub
				
				Private Sub Timer1_Timer()
				start.Winsock1.SendData "get_data"
				Timer1.Enabled = False
				End Sub