如何用VB的码详抄底紫金源码MScomm打开两端口（如COM2和3），并实现通信？

       用以下代码检查你机器有几个COM口,码详python大富翁源码那些COM口可用,那些不存在,

       Option Explicit

        Dim a As Integer

       Private Sub Command1_Click()

        On Error GoTo uerror

        For a = 1 To 4

        MSComm1.CommPort = a

        MSComm1.PortOpen = True '当True时是打开

        If MSComm1.PortOpen = True Then

        Print "可用Com号= "; a

        MSComm1.PortOpen = False 当False时是关闭

        Else

        End If

        Next

        Exit Sub

       uerror:

        If Err.Number = Then

        Print "端口" & a & "已打开，请关闭其它应用程序占用的码详cef网页源码怎么获取端口" & a

        ElseIf Err.Number = Then

        Print "出错Com号= "; a

        End If

        Resume Next

       End Sub

       以下代码使用COM2口和COM3口通信:

       Option Explicit

        Dim strData As String

        Dim bytInput() As Byte

        Dim dataSend() As Byte

        Dim sj() As Byte

        Dim i As Long

        Dim Ulen As Long

        Dim Llen As Long

        Dim for_Sum As Long

        Dim Yu_sum As Integer

       Private Sub Form_Load() '初始化

        Timer2.Interval =

        MSComm1.Settings = ",n,8,1"

        MSComm1.CommPort = 2

        MSComm1.RThreshold = 1

        MSComm1.PortOpen = True

        MSComm2.Settings = ",n,8,1"

        MSComm2.CommPort = 3

        MSComm2.RThreshold = 1

        MSComm2.PortOpen = True

       End Sub

       Private Sub MsComm1_OnComm()

        Dim intInputLen As Integer

        Select Case Me.MSComm1.CommEvent

        Case comEvReceive

        '此处添加处理接收的代码

        Me.MSComm1.InputMode = comInputModeBinary '二进制接收

        intInputLen = Me.MSComm1.InBufferCount

        ReDim bytInput(intInputLen)

        bytInput = Me.MSComm1.Input

        jieshou

        End Select

       End Sub

       Public Function jieshou() '接收数据处理为进制字符

        Dim i As Integer

        For i = 0 To UBound(bytInput)

        If Len(Hex(bytInput(i))) = 1 Then

        strData = strData & "0" & Hex(bytInput(i))

        Else

        strData = strData & Hex(bytInput(i))

        End If

        Next

        RichTextBox1 = strData

        Text1 = Len(strData) \ 2

       End Function

       Private Sub Command2_Click()

        Dim byts() As Byte

        Dim l As Integer

        byts(0) = &H1

        byts(1) = &H

        byts(2) = &H0

        byts(3) = &H0

        byts(4) = &HFF

        For l = 5 To

        byts(l) = - l + 5

        Next

        MSComm2.Output = byts

       End Sub