用Winsock制作一套聊天室和对话系统

Text1.SetFocus

End Sub



Private Sub a_Error(ByVal Number As Integer, Description As String, ByVal Scode As Long, ByVal Source As String, ByVal HelpFile As String, ByVal HelpContext As Long, CancelDisplay As Boolean)

flag = False

Timer1.Enabled = False

Comm2.MousePointer = 0

Form1.MousePointer = 0

MsgBox "网络连接失败 ！"

Label3.Caption = "等待连接"

Combo1.Enabled = True

Combo1.SetFocus

a.Close

Comm2.Caption = "连接"

End Sub



Private Sub Comm1_Click()

a.Close 注释：关闭连接

Form1.WindowState = 1

End Sub



Private Sub Comm2_Click()

If Comm2.Caption = "断开连接" Then

a.Close

Comm2.Caption = "连接"

Label3.Caption = "等待连接"

Combo1.Enabled = True

Timer1.Enabled = False

Comm2.MousePointer = 0

Form1.MousePointer = 0

Else

Text2.Text = ""

Label3.Caption = "正在连接.."

Comm2.MousePointer = 11

Form1.MousePointer = 11

Timer1.Enabled = True

flag = False

a.Protocol = sckTCPProtocol

a.RemoteHost = Combo1.Text

a.RemotePort = 3000

a.Connect

End If

End Sub



Private Sub Form_DblClick()

If MsgBox("关闭本聊天室! 确认吗？", 36, "退出系统") = 6 Then

End

Else

Form1.WindowState = 1

End If

End Sub



Private Sub Form_Load()

If App.PrevInstance Then

MsgBox "本系统已经加载，请看任务拦！", 48, "提示"

End

End If

flag = False

Load Form2 ‘读入form2进入监听

End Sub



Private Sub Send_Click()

Dim S As String

On Error GoTo ffff ‘防止链路中断

Send.MousePointer = 11

If Right(Text1.Text, 1) <> Chr(10) Then

S = Text1.Text + Chr(13) + Chr(10)

Else

S = Text1.Text

End If

If flag Then

a.SendData S

End If

Exit Sub

ffff:

MsgBox "连接中断!", 48, "提示"

a.Close

Send.MousePointer = 0

Comm2.Caption = "连接"

Label3.Caption = "等待连接"

Combo1.Enabled = True

Comm2.MousePointer = 0

Form1.MousePointer = 0

Exit Sub

End Sub



Private Sub Timer1_Timer()

flag = False

Timer1.Enabled = False

Comm2.MousePointer = 0

Form1.MousePointer = 0

MsgBox "网络连接失败(超时) ！"

Label3.Caption = "等待连接"

Combo1.Enabled = True

Combo1.SetFocus

a.Close

Comm2.Caption = "连接"

End Sub



⑶ 在Form2的各控件事件中加入如下代码:

Const maxn = 200 ‘最大同时连接本机的客户数

Dim user(maxn) As Boolean



Private Sub Command1_Click()

Form2.Hide

End Sub



Private Sub Command2_Click()

Load Form1

Form1.Show

End Sub



Private Sub Form_Load()

Dim str1 As String

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