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Option Explicit
Dim str1 As String
Private Sub Form_Load()
MSComm1.PortOpen = True
MSComm1.RThreshold = 1
End Sub
Private Sub MSComm1_OnComm()
Select Case MSComm1.CommEvent
Case 2
MSComm1.InputLen = 0
str1 = str1 & MSComm1.Input
Debug.Print "接收1 - " + str1
txtBox1.Text = str1
End Select
End Sub