串口通信232VB程序多字节发送改编
现在下面的这个程序是单字节发送，比如发送的是01他接收的就是01.现在我要求要多字节发送，比如发送的是010203对应的接收就是010203，这个程序怎么改都改不对，谢谢了。
Private Sub Form_Load()

If MSComm1.PortOpen = True Then
MSComm1.PortOpen = False
Else
End If

Combo1.AddItem "COM1"
Combo1.AddItem "COM2"
Combo1.AddItem "COM3"
Combo1.ListIndex = 2

Combo3.AddItem "4"
Combo3.AddItem "5"
Combo3.AddItem "6"
Combo3.AddItem "7"
Combo3.AddItem "8"


MSComm1.CommPort = Combo1.ListIndex + 1
MSComm1.Settings = "9600,n,8,1"
ComOpen.Caption = "′ò?a′??ú"
Shape1.FillColor = &HFFFFC0

End Sub

Private Sub ComOpen_Click()
On Error GoTo uerror

If ComOpen.Caption = "1?±?′??ú" Then
MSComm1.PortOpen = False
ComOpen.Caption = "′ò?a′??ú"
Shape1.FillColor = &HFFFFC0
Else

MSComm1.PortOpen = True
ComOpen.Caption = "1?±?′??ú"
Shape1.FillColor = &HFF
End If
Exit Sub


uerror:
msg$ = "?TD§???úo?"
Title$ = "′??úμ÷ê??úê?"
X = MsgBox(msg$, 48, Title$)
End Sub

Private Sub MSComm1_OnComm()
Dim BytReceived() As Byte
Dim i As Integer
Dim strBuff As String
Select Case MSComm1.CommEvent
Case 2
Cls

MSComm1.InputLen = 0 '0±íê??áè??o3???è?2??úèY
strBuff = MSComm1.Input '?áè?μ??o3???

BytReceived() = strBuff '?t?????óê??￡ê?
For i = 0 To UBound(BytReceived)
If Len(Hex(BytReceived(i))) = 1 Then
strData = strData & "0" & Hex(BytReceived(i)) & " " 'è?1???óDò???×???￡??ò?°210￡?è?F??ê?0F￡?×?oó21????
Else '??±???ê?1?2ìè?￡o 00 0F FE
strData = strData & Hex(BytReceived(i)) & " "

End If
Next
TextReceive = TextReceive & strData
strData = ""

End Select
End Sub

Private Sub ComSend1_Click()
Dim Temp(0) As Byte
Dim strBuff As String
Temp(0) = "&H" & TextSend
MSComm1.Output = Temp
If MSComm1.PortOpen = False Then
MsgBox "??′ò?a′??ú"
End If

On Error GoTo uerror
MSComm1.Output = strBuff

uerror:

End Sub

Private Sub ComClean1_Click()

TextSend.Text = ""

End Sub

Private Sub Timer1_Timer()

Call ComSend1_Click

End Sub


Private Sub Combo1_Click()

If MSComm1.PortOpen = True Then
MSComm1.PortOpen = False
End If
MSComm1.CommPort = Combo1.ListIndex + 1

End Sub

Private Sub ComClean2_Click()

TextReceive.Text = ""

End Sub

[解决办法]
http://download.csdn.net/source/1262066
[解决办法]
把要发的数据组成一数组连续发不就行了！
[解决办法]
触发oncomm事件与MSComm1.RThreshold设置相关。