串口测试.frm

一个ＶＢ通讯不错的程序

VERSION 5.00
Object = "{648A5603-2C6E-101B-82B6-000000000014}#1.1#0"; "MSCOMM32.OCX"
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   4695
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   6330
   LinkTopic       =   "Form1"
   ScaleHeight     =   4695
   ScaleWidth      =   6330
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command3 
      Caption         =   "结束"
      Height          =   495
      Left            =   2040
      TabIndex        =   6
      Top             =   3480
      Width           =   1215
   End
   Begin VB.CommandButton Command2 
      Caption         =   "接收"
      Height          =   495
      Left            =   3120
      TabIndex        =   5
      Top             =   2640
      Width           =   1215
   End
   Begin VB.CommandButton Command1 
      Caption         =   "发送"
      Height          =   495
      Left            =   1080
      TabIndex        =   4
      Top             =   2640
      Width           =   1095
   End
   Begin VB.TextBox Text2 
      Height          =   1095
      Left            =   3000
      TabIndex        =   3
      Top             =   1200
      Width           =   1575
   End
   Begin VB.TextBox Text1 
      Height          =   1095
      Left            =   840
      TabIndex        =   2
      Top             =   1200
      Width           =   1575
   End
   Begin MSCommLib.MSComm MSComm1 
      Left            =   5040
      Top             =   360
      _ExtentX        =   1005
      _ExtentY        =   1005
      _Version        =   393216
      DTREnable       =   -1  'True
   End
   Begin VB.Label Label2 
      Caption         =   "接收区"
      Height          =   255
      Left            =   3000
      TabIndex        =   1
      Top             =   960
      Width           =   735
   End
   Begin VB.Label Label1 
      Caption         =   "传送区"
      Height          =   255
      Left            =   840
      TabIndex        =   0
      Top             =   960
      Width           =   735
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
Dim buf$
MSComm1.Output = Trim(Text1.Text)
buf = Trim(MSComm1.Input)
If Len(buf) = 0 Then
   Text2.Text = "empty"
Else
   Text2.Text = buf
End If

End Sub

Private Sub Command2_Click()
Dim buf$
buf = Trim(MSComm1.Input)
If Len(buf) = 0 Then
   Text2.Text = "empty"
Else
   Text2.Text = buf
End If
End Sub

Private Sub Command3_Click()
MSComm1.PortOpen = False
End
End Sub

Private Sub Form_Load()
MSComm1.PortOpen = True
End Sub