Question

很抱歉，如果我没有解释清楚。 dll不是用VB编写的，用机器语言编写，你实际上可以从vb6 delphi 7和c ++访问dll。连接方法“PBusConnectEx”完美地适用于C＃代码。我真正的问题是我在vb6中有一个“类型”我必须在C＃中使它成为“结构”。

第一个问题是你是否认为C＃中的结构“struct”等同于vb6中的“type”结构。

第二个问题是，如果你认为外部函数声明“PBusTransferPLUCluster”与vb6中的外部函数声明“PBusTransferPLUCluster”相比做得好。

第三个问题是：¿你怎么认为应该调用PBusTransferPLUCluster函数和参数类型必须与vb6中的PBusTransferPLUCluster函数调用相比较。对不起，如果我知道我上面的解释，我是新来的论坛，不会写得很好。

VB6 Code Unit1.bas

Attribute VB_Name = "Module1"
Type TPlu
   PLUName As String
   LFCode As Long
   Code As String
   BarCode As Long
   UnitPrice As Long
   WeightUnit As Long
   Deptment As Long
   Tare As Double
   ShlefTime As Long
   PackageType As Long
   PackageWeight As Double
   Tolerance As Long
   Message1 As Byte
   Reserved As Byte
   Reserved1 As Integer
   Message2 As Byte
   Reserved2 As Byte
   MultiLabel As Byte
   Rebate As Byte
   Account As Long
End Type

Type TPLUCluster
   PLU(0 To 3) As TPlu
End Type

Type THotkeyTable
   Hotkey(0 To 83) As Long
End Type

Declare Function PBusConnect Lib "PBusDrv.dll" (ByVal RefLFZKFileName As String, ByVal RefCFGFileName As String, ByVal SerialNO As Integer, ByVal CommName As String, ByVal BaudRate As Integer) As Long
Declare Function PBusDisConnect Lib "PBusDrv.dll" (ByVal SerialNO As Integer) As Long
Declare Function PBusTransferPLUCluster Lib "PBusDrv.dll" (ByRef PLUCluster As TPLUCluster) As Long
Declare Function PBusTransferHotkey Lib "PBusDrv.dll" (ByRef HotkeyTable As THotkeyTable, ByVal TableIndex As Long) As Long
Declare Function PBusPLUToStr Lib "PBusDrv.dll" (ByRef PLU As TPlu, ByVal LPStr As String) As Long
Declare Function PBusStrToPLU Lib "PBusDrv.dll" (ByVal LPStr As String, ByRef PLU As TPlu) As Long
Declare Function MessageBox Lib "user32" Alias "MessageBoxA" (ByVal hwnd As Long, ByVal lpText As String, ByVal lpCaption As String, ByVal wType As Long) As Long

Unit1.frm

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Sample for Windows NT 4.0"
   ClientHeight    =   1500
   ClientLeft      =   1770
   ClientTop       =   1710
   ClientWidth     =   2190
   LinkTopic       =   "Form1"
   PaletteMode     =   1  'UseZOrder
   ScaleHeight     =   1500
   ScaleWidth      =   2190
   Begin VB.CommandButton TestBtn 
      Caption         =   "Test"
      Height          =   375
      Left            =   360
      TabIndex        =   1
      Top             =   480
      Width           =   1335
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      Height          =   195
      Left            =   1560
      TabIndex        =   0
      Top             =   4560
      Width           =   45
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False

Private Sub TestBtn_Click()
Dim Result As Long
Dim PLUCluster As TPLUCluster
Dim PLU As TPlu
Dim HotkeyTable As THotkeyTable
Dim Str As String

PLU.PLUName = "chorizoxx"
PLU.LFCode = 1
PLU.Code = 1
PLU.Deptment = 1
PLU.UnitPrice = 21414
PLU.BarCode = 22
PLUCluster.PLU(0) = PLU

Result = PBusConnectEx(".\lfzk.dat", ".\system.cfg", "192.168.1.87")
Result = PBusTransferPLUCluster(PLUCluster)
Result = PBusDisConnect(1234)
Result = MessageBox(0, "Test OK", "Demo", 0)

End Sub

这是我的C＃代码：

using System.Runtime.InteropServices;
[StructLayout(LayoutKind.Sequential)]

namespace BALANZAC_{

   public partial class MainForm : Form{

      struct TPlu{
      public string PLUName;
      public long LFCode;
      public string Code;
      public long BarCode;
      public long UnitPrice;
      public long WeightUnit;
      public long Deptment;
      public double Tare;
      public long ShlefTime;
      public long PackageType;
      public long PackageWeight;
      public long Tolerance;
      public byte Message1;
      public byte Reserved;
      public int Reserved1;
      public byte Message2;
      public byte Reserved2;
      public byte MultiLabel;
      public byte Rebate;
      public long Account;
   }

   private TPlu PLU;
   private TPlu[] PPC=new TPlu[3];

   [DllImport("PBusDrv.dll")]
   public static extern int PBusConnectEx(string RefLFZKFileName, string RefCFGFileName , string IPAddr);
   [DllImport("PBusDrv.dll")]

   private static extern int PBusTransferPLUCluster([MarshalAs(UnmanagedType.LPArray, SizeConst=3)]TPlu[] PPC);

      public MainForm()
         InitializeComponent();

         PBusConnectEx("lfzk.dat", "system.cfg", "192.168.1.87");
         PLU.PLUName="PRUEBA PESADO X1";
         PLU.Code="222";
         PLU.LFCode=222;
         PLU.Deptment=1;
         PLU.UnitPrice=12993;
         PLU.BarCode=22;
         PPC[0]=PLU;
         PLUCluster.PLU[0]=PLU;


        }
    }   
}

如果我不能在上一篇文章中解释我，真的很抱歉。

Answer 1

Vb6中的Int是C＃中的短，VB6中的long是C＃中的Int

VB6没有像C＃

那样的64位长

您可以在VB6中为Long（C＃）创建UDT，

Type VB6Long64
   LoValue As Long
   HiValue As Long
End Type

请参阅Data Type comparison between VB6 and VS2005和how to do 64 bit in vba (i.e. VB6)

如何使用marshal在c＃中使用vb6中的类型执行struct数组

1 个答案: