请问如何在使用Access 所带的Barcode控件时,把生成的条码保存成bmp 文件?还请高手指点!
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参看http://www.newlifesoft.com/txm/txmbc/tmbc3.htm
我从你给的网址下载了一个 zip文件并安装了。我就要实现那个效果,特别是保存成bmp的功能,能否指点一下如何在程序中实现?谢谢!
Private Sub Command2_Click() '保存
BarCode.SaveBarCode "e:\2.bmp"
End SubPrivate Sub Command1_Click()'码值
BarCode.Value = Text1.Text
End Sub
但是我还想问一句:我看这个控件好像是在Access 所带的Barcode控件的基础上添加了几个方法属性的,是吧?我就想问一下 这个SaveBarCode 属性是怎么用vb代码实现的?如果能得到这个答案,就万分感谢,马上结贴!!!呵呵
Private Declare Function createcompatibledc Lib "gdi32" Alias "CreateCompatibleDC" (ByVal hdc As Long) As Long
'在memory中建立一个位图:
Private Declare Function createcompatiblebitmap Lib "gdi32" Alias "CreateCompatibleBitmap" (ByVal hdc As Long, ByVal nwidth As Long, ByVal nheight As Long) As Long'把一个gdi对象放入dc,返回原先的那个:
Private Declare Function selectobject Lib "gdi32" Alias "SelectObject" (ByVal hdc As Long, ByVal hobject As Long) As Long
'删除gdi对象:
Private Declare Function deleteobject Lib "gdi32" Alias "DeleteObject" (ByVal hobject As Long) As Long'剪贴板函数:
Private Declare Function openclipboard Lib "user32" Alias "OpenClipboard" (ByVal hwnd As Long) As Long
Private Declare Function closeclipboard Lib "user32" Alias "CloseClipboard" () As Long
Private Declare Function setclipboarddata Lib "user32" Alias "SetClipboardData" (ByVal wformat As Long, ByVal hmem As Long) As Long
Private Declare Function emptyclipboard Lib "user32" Alias "EmptyClipboard" () As Long
Private Const cf_bitmap = 2
'条形码控件Bar1
Private Sub command1_click()
Dim lhdc As Long
Dim lhbmp As Long
Dim lhbmpold As Long
Me.ScaleMode = 3
'在内存中建立一个指向我们将要复制对象的dc:
lhdc = createcompatibledc(Me.hdc)
If (lhdc <> 0) Then
'建立一张指向将要复制对象的位图:
lhbmp = createcompatiblebitmap(Me.hdc, Bar1.Width, Bar1.Height)
If (lhbmp <> 0) Then
'把位图选入我们刚才建立的dc中,并贮存原先在那里的老位图:
lhbmpold = selectobject(lhdc, lhbmp)
'把objfrom的内容复制到建立的位图里:
bitblt lhdc, 0, 0, Bar1.Width, Bar1.Height, Me.hdc, Bar1.left, Bar1.top, vbSrcCopy
'恢复dc中的内容:
selectobject lhdc, lhbmpold
'现在把位图装入剪贴板:
emptyclipboard
openclipboard 0
setclipboarddata cf_bitmap, lhbmp
closeclipboard '我们在这里不用删除建立的位图——
'它现在属于剪贴板,当剪贴板变化时,windows将为我们删除它。
End If
'清除刚才建立的dc:
deleteobject lhdc
'保存图片为BMP格式
SavePicture Clipboard.GetData(vbCFBitmap), "c:\1.bmp"
End If
End Sub