如题,电脑明明有两个串口,为什么只显示一个,如果直接打开第二个端口也没问题
Private Sub Form_Load()
Dim i, j As Integer
j = 0
For i = 1 To 10
MSComm1.CommPort = i
On Error Resume Next
MSComm1.PortOpen = True If Err.Number = 0 Then
j = j + 1
Combo1.AddItem i
Else
MSComm1.PortOpen = False
End If
Next i
End Sub
Private Sub Form_Load()
Dim i, j As Integer
j = 0
For i = 1 To 10
MSComm1.CommPort = i
On Error Resume Next
MSComm1.PortOpen = True If Err.Number = 0 Then
j = j + 1
Combo1.AddItem i
Else
MSComm1.PortOpen = False
End If
Next i
End Sub
Private Sub Form_Load()
Dim i, j As Integer
j = 0
For i = 1 To 10
MSComm1.CommPort = i
On Error Resume Next
MSComm1.PortOpen = True
If Err.Number = 0 Then
j = j + 1
Combo1.AddItem i
End If
MSComm1.PortOpen = False
Next i
End Sub
Dim i, j As Integer
j = 0
For i = 1 To 4
MSComm1.CommPort = i
On Error Resume Next
MSComm1.PortOpen = True
If Err.Number = 0 Then
j = j + 1
Combo1.AddItem i
MSComm1.PortOpen = False
End If
Next i
End Sub