实战Visual Basic条形码编程

Option Explicit
Dim sData As String
Private Sub Form_Load()
With MSComm1
.CommPort = 3 '设为COM3，试运行的系统而定，你可提供一个Combox让用户选择。
.PortOpen = True　'打开通讯端口
End With
End Sub

Private Sub MSComm1_OnComm()

Dim EndPos As Integer
Select Case MSComm1.CommEvent
Case comEvReceive '当有数据传送过来时
sData = sData & Trim(MSComm1.Input)
'检索回车,通常读卡机每组数据結尾都返回一个回车作为结束符
EndPos = InStr(1, sData, Chr(13))
If EndPos = 0 Then '如果未结束就继续努力
Else '读完一组。
lblBarCode.Caption = sData '显示一组条形码
With lstBarCode
.AddItem Mid(sData, 1, EndPos - 1) '添加一组条形码到列表
End With
sData = "" '清空
End If
End Select
End Sub

Private Sub cmdEnd_Click()
MSComm1.PortOpen = False '关闭端口
End
End Sub

Option Explicit

'声明BitBlt、GetDesktopWindow、GetWindowDC、ReleaseDC这几个API函数略

Public RegUser As Boolean

Sub GetObjImage1(Obj As Object, OwnerForm As PictureBox, Picture1 As PictureBox)
'hDC
Dim hWndDesk As Long
Dim hDCDesk As Long
'区域表达变量
Dim x As Long
Dim y As Long
Dim w As Long
Dim h As Long

x = Obj.Left Screen.TwipsPerPixelX
y = Obj.Top Screen.TwipsPerPixelY
w = Obj.Width Screen.TwipsPerPixelX
h = Obj.Height Screen.TwipsPerPixelY
hDCDesk = OwnerForm.hdc
'取出图像
Call BitBlt(Picture1.hdc, 0, 0, w, h, hDCDesk, x, y, vbSrcCopy)
Call ReleaseDC(hWndDesk, hDCDesk)

End Sub

Private Sub cmdPrint_Click()
'生成条形码图像
Dim r As Long, i As Integer, t As String,cfile As String '临时变量
t = BarCode
For i = 0 To Val(Times) - 1

BarCode1.Value = BarCode + i
DoEvents
Picture1.Refresh

GetObjImage1 BarCode1, Conel, Picture1

If RegUser = False Then '如果未注册添加MASK标记
Picture1.PaintPicture Picture2.Picture, 300, 300
End If

If Dir(SavePath, vbDirectory) = "" Then MkDir SavePath

SavePath = SavePath & IIf(Right(SavePath, 1) <> "", "", "")

cfile = SavePath & BarCode1.Value & ".bmp"

SavePicture Picture1.Image, cfile '将条形码保存为图像文件以便打印
Next
BarCode = t

End Sub

Option Explicit
'条形码设置模块

Private Sub cboBig_Click()
BarCode1.Style = cboBig.ListIndex '改变标准
End Sub

Private Sub cboDirection_Click()
BarCode1.Direction = cboDirection.ListIndex '改变方向
End Sub

Private Sub cboLine_Click()
BarCode1.LineWeight = cboLine.ListIndex '改变线宽
End Sub

Private Sub cboSmall_Click()
BarCode1.SubStyle = cboSmall.ListIndex '改变样式
End Sub

Private Sub Check1_Click()
BarCode1.ShowData = Check1.Value '是否显示数据
End Sub

Private Sub cmdChange_Click()
'设置长、宽大小
BarWidth = BarCode1.Height
BarHeight = BarCode1.Width
cmdRefresh_Click
End Sub

Private Sub cmdOK_Click()
'传送条形码设定到主界面
With frmMain.BarCode1
.LineWeight = BarCode1.LineWeight
.Style = BarCode1.Style
.SubStyle = BarCode1.SubStyle
.Direction = BarCode1.Direction
.Width = BarCode1.Width
.Height = BarCode1.Height
.ShowData = BarCode1.ShowData
Me.Hide
End With
With frmMain
.Picture1.Width = .BarCode1.Width
.Picture1.Height = .BarCode1.Height
.Conel.Width = .BarCode1.Width
.Conel.Height = .BarCode1.Height
End With
End Sub

Private Sub cmdRefresh_Click()
BarCode1.Width = BarWidth
BarCode1.Height = BarHeight
End Sub

Private Sub Form_Load()
LoadBarInfo
BarWidth = BarCode1.Width
BarHeight = BarCode1.Height
End Sub

Sub LoadBarInfo() '初始化选项
LoadBigClass cboBig
LoadSmallClass cboSmall
LoadLineSize cboLine
LoadDirection cboDirection
End Sub
Sub LoadBigClass(cbo As ComboBox) '条码标准
With cbo
.AddItem "UPC-A"
.AddItem "UPC-E"
.AddItem "EAN-13"
.AddItem "EAN-8"
.AddItem "Case Code"
.AddItem "Codabar (NW-T)"
.AddItem "Code-39"
.AddItem "Code-128"
.AddItem "U.S. Postnet"
.AddItem "U.S. Postal FIM"
.AddItem "JP Post"
.ListIndex = 2
End With
End Sub
Sub LoadSmallClass(cbo As ComboBox) '条码样式
With cbo
.AddItem "Standard"
.AddItem "2-Digit Supplement"
.AddItem "5-Digit Supplement"
.AddItem "POS Case Code"
.ListIndex = 0
End With
End Sub