界面如下：代码如下：Private Sub Form_Load()If MSComm1.PortOpen = True Then MSComm1.PortOpen = False ElseEnd IfCombo1.AddItem "COM1"Combo1.AddItem "COM2"Combo1.AddItem "COM3"Combo1.AddItem "COM4"Combo1.AddItem "COM5"Combo1.AddItem "COM6"Combo1.AddItem "COM7"Combo1.AddItem "COM8"Combo1.AddItem "COM9"Combo1.AddItem "COM10"Combo1.AddItem "COM11"Combo1.AddItem "COM12"Combo1.AddItem "COM13"Combo1.AddItem "COM14"Combo1.AddItem "COM15"Combo1.AddItem "COM16"Combo1.ListIndex = 2Combo2.AddItem "256000"Combo2.AddItem "128000"Combo2.AddItem "115200"Combo2.AddItem "57600"Combo2.AddItem "38400"Combo2.AddItem "28800"Combo2.AddItem "19200"Combo2.AddItem "14400"Combo2.AddItem "12800"Combo2.AddItem "11520"Combo2.AddItem "9600"Combo2.AddItem "4800"Combo2.AddItem "2400"Combo2.AddItem "1200"Combo2.AddItem "600"Combo3.AddItem "无None"Combo3.AddItem "奇Odd"Combo3.AddItem "偶Even"Combo4.AddItem "4"Combo4.AddItem "5"Combo4.AddItem "6"Combo4.AddItem "7"Combo4.AddItem "8"Combo5.AddItem "1"Combo5.AddItem "2"mPort = Combo1.ListIndex + 1 MSComm1.Settings = "9600,n,8,1"ComOpen.Caption = "打开串口"Shape1.FillColor = &HFFFFC0End SubPrivate Sub ComOpen_Click()On Error GoTo uerror '发现错误跳转到错误处理If ComOpen.Caption = "关闭串口" ThenMSComm1.PortOpen = FalseComOpen.Caption = "打开串口" '按钮文字改变Shape1.FillColor = &HFFFFC0 '灯颜色改变ElseMSComm1.PortOpen = TrueComOpen.Caption = "关闭串口"Shape1.FillColor = &HFFEnd IfExit Subuerror:msg$ = "无效端口号" '错误显示Title$ = "串口调试助手"X = MsgBox(msg$, 48, Title$) '48标示显示警告图标End SubPrivate Sub MSComm1_OnComm()Dim BytReceived() As ByteDim strBuff As StringDim i As IntegerSelect Case mEvent '事件发生Case 2ClsMSComm1.InputLen = 0 '读入缓冲区全部内容strBuff = MSComm1.Input '读入到缓冲区Label10.Caption = Label10.Caption + Len(strBuff) '接收计数If MSComm1.InputMode = comInputModeBinary ThenBytReceived() = strBuff '如果是二进制接收模式则进行数据处理，否则直接显示字符串For i = 0 To UBound(BytReceived)If Len(Hex(BytReceived(i))) = 1 ThenstrData = strData & "0" & Hex(BytReceived(i)) & " " '如果只有一个字符，则前补0，如F显示0F，最后补空格Else '方便显示观察如： 00 0F FEstrData = strData & Hex(BytReceived(i)) & " "End IfNextTextReceive = TextReceive & strDatastrData = ""ElseTextReceive = TextReceive & strBuffEnd IfEnd SelectEnd SubPrivate Sub ComSend1_Click() '手动发送Dim Temp(0) As ByteDim strBuff As StringIf Option1.Value = True Then '如果显示16进制发送则进行16进制处理，这里只发送一个Temp(0) = "&H" & TextSendMSComm1.Output = Temp '发送一个16进制ElsestrBuff = TextSendEnd IfIf MSComm1.PortOpen = False ThenMsgBox "请打开串口"End IfOn Error GoTo uerrorMSComm1.Output = strBuffLabel11.Caption = Label11.Caption + Len(strBuff) '发送计数uerror:End SubPrivate Sub ComSend2_Click()If ComSend2.Caption = "自动发送" ThenComSend2.Caption = "关闭自动发送"Timer1.Interval = TextTime.TextTimer1.Enabled = TrueElseComSend2.Caption = "自动发送"Timer1.Enabled = FalseEnd IfEnd SubPrivate Sub ComClean1_Click()TextSend.Text = "" '清空发送窗口End SubPrivate Sub Option3_Click()MSComm1.InputMode = comInputModeBinary '选择接收方式End SubPrivate Sub Option4_Click()MSComm1.InputMode = comInputModeText '选择接收方式End SubPrivate Sub Timer1_Timer()Call ComSend1_Click '定时调用手动发送End SubPrivate Sub Timer2_Timer()If Combo3 = "无None" ThenMSComm1.Settings = Str(Combo2) + "N" + Str(Combo4) + Str(Combo5)ElseIf Combo3 = "奇Odd" ThenMSComm1.Settings = Str(Combo2) + "O" + Str(Combo4) + Str(Combo5)ElseIf Combo3 = "偶Even" ThenMSComm1.Settings = Str(Combo2) + "E" + Str(Combo4) +Str(Combo5)End IfEnd SubPrivate Sub Combo1_Click()If MSComm1.PortOpen = True Then '如果串口打开先关闭后再进行其他操作MSComm1.PortOpen = FalseEnd IfmPort = Combo1.ListIndex + 1 '读取com口号End SubPrivate Sub ComClean3_Click()Label10.Caption = 0Label11.Caption = 0End SubPrivate Sub ComClean2_Click()TextReceive.Text = "" '接收窗口End Sub功能上：实现了字符串的发送和接收，8位数据的十六进制发送和接收，有端口，波特率等设置。