VERSION 5.00
Begin VB.Form frmMain 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "LPT Ports"
   ClientHeight    =   2625
   ClientLeft      =   30
   ClientTop       =   330
   ClientWidth     =   4740
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2625
   ScaleWidth      =   4740
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   375
      Left            =   3360
      TabIndex        =   5
      Top             =   1320
      Width           =   1095
   End
   Begin VB.CommandButton btnClose 
      Caption         =   "Close"
      Height          =   372
      Left            =   3240
      TabIndex        =   3
      Top             =   720
      Width           =   1332
   End
   Begin VB.CommandButton btnGet 
      Caption         =   "Get"
      Height          =   372
      Left            =   3240
      TabIndex        =   2
      Top             =   240
      Width           =   1332
   End
   Begin VB.ListBox List1 
      Height          =   1320
      Left            =   240
      TabIndex        =   1
      Top             =   360
      Width           =   2772
   End
   Begin VB.Label Label2 
      Caption         =   "Copyright (c) 1999-2001 Hai Li, Zeal SoftStudio http://www.zealsoftstudio.com"
      Height          =   492
      Left            =   120
      TabIndex        =   4
      Top             =   2040
      Width           =   4572
   End
   Begin VB.Label Label1 
      Caption         =   "Result:"
      Height          =   252
      Left            =   240
      TabIndex        =   0
      Top             =   120
      Width           =   972
   End
End
Attribute VB_Name = "frmMain"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' LPTPort sample
' Copyright (c) 1997-2001 Hai Li, Zeal SoftStudio.
' E-Mail:info@zealsoftstudio.com
' http://www.zealsoftstudio.com (English)
' http://www.nease.net/~zealsoft/ (Chinese)
' This sample illustrates how to use NTPort
' Library to get LPT ports address.
Option Explicit
 Dim nAddress As Integer
    Dim i, nError As Integer
Private Sub btnClose_Click()
    End
End Sub

Private Sub btnGet_Click()
    Dim nAddress As Integer
    Dim i, nError As Integer
    
    List1.Clear
    For i = 1 To 3
        nAddress = GetLPTPortAddress(i)
        nError = GetLastState(vbNullString)
        If nAddress Then
            List1.AddItem "LPT" & i & ": " & Hex(nAddress) & "H"
        ElseIf nError Then
            List1.AddItem "LPT" & i & ": Error"
        Else
            List1.AddItem "LPT" & i & ": absent"
        End If
    Next
End Sub

Private Sub Command1_Click()
nAddress = GetLPTPortAddress(1)
List1.AddItem "LPT" & i
End Sub