form1.frm

电子书“Visual Basic 6 网络编程实例教程.rar”

VERSION 5.00
Begin VB.Form Form1 
   BackColor       =   &H00808000&
   BorderStyle     =   1  'Fixed Single
   Caption         =   "发送系统消息"
   ClientHeight    =   4185
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   5190
   Icon            =   "Form1.frx":0000
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   4185
   ScaleWidth      =   5190
   StartUpPosition =   2  '屏幕中心
   Begin VB.CommandButton Command1 
      Caption         =   "发送(&S)"
      Height          =   495
      Left            =   3480
      TabIndex        =   9
      Top             =   3480
      Width           =   1215
   End
   Begin VB.TextBox Text4 
      Height          =   1335
      Left            =   1320
      MultiLine       =   -1  'True
      TabIndex        =   3
      Text            =   "Form1.frx":030A
      Top             =   2040
      Width           =   3375
   End
   Begin VB.TextBox Text3 
      Height          =   375
      Left            =   1320
      TabIndex        =   2
      Text            =   "Text3"
      Top             =   1440
      Width           =   3375
   End
   Begin VB.TextBox Text2 
      Height          =   375
      Left            =   1320
      TabIndex        =   1
      Text            =   "Text2"
      Top             =   960
      Width           =   3375
   End
   Begin VB.TextBox Text1 
      Height          =   375
      Left            =   1320
      TabIndex        =   0
      Text            =   "Text1"
      Top             =   480
      Width           =   3375
   End
   Begin VB.Label Label6 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "消息"
      ForeColor       =   &H00FFFFFF&
      Height          =   180
      Left            =   240
      TabIndex        =   8
      Top             =   2160
      Width           =   360
   End
   Begin VB.Label Label5 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "服务器"
      ForeColor       =   &H00FFFFFF&
      Height          =   180
      Left            =   240
      TabIndex        =   7
      Top             =   480
      Width           =   540
   End
   Begin VB.Label Label3 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "消息源"
      ForeColor       =   &H00FFFFFF&
      Height          =   180
      Left            =   240
      TabIndex        =   6
      Top             =   1560
      Width           =   540
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "目的地"
      ForeColor       =   &H00FFFFFF&
      Height          =   180
      Left            =   240
      TabIndex        =   5
      Top             =   960
      Width           =   540
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "Label1"
      ForeColor       =   &H00FFFFFF&
      Height          =   180
      Left            =   240
      TabIndex        =   4
      Top             =   3600
      Width           =   540
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Sub Command1_Click()
     Dim MSgData As NetMessageData
   Dim sSuccess As String
   With MSgData
      .sServerName = Text1.Text
      .sSendTo = Text2.Text
      .sSendFrom = Text3.Text
      .sMessage = Text4.Text
   End With
    sSuccess = NetSendMessage(MSgData)
    Label1.Caption = sSuccess
End Sub

Private Sub Form_Load()
    Dim tmp As String
  '先在各个文本框中装入本地机名，以用于测试。
  '当然，用户可修改文本框中的内容。
   tmp = Space$(MAX_COMPUTERNAME + 1)
   Call GetComputerName(tmp, Len(tmp))
   Text1.Text = TrimNull(tmp)
   Text2.Text = TrimNull(tmp)
   Text3.Text = TrimNull(tmp)
End Sub

Private Function TrimNull(item As String)
  '删除字符串的结尾空字符
   Dim pos As Integer
   pos = InStr(item, Chr$(0))
   If pos Then
         TrimNull = Left$(item, pos - 1)
   Else: TrimNull = item
   End If
End Function