通用数据链接文件 (*.UDL) 的创建

援用 microsoft ole db service component 1.0 type libraryoption explicitprivate sub command1_click()dim x as new msdasc.datalinksx.hwnd = me.hwnddim s as stringon error goto errorhandlers = x.promptnewon error goto 0if vba.len(vba.trim(s & "")) > 0 thendim commondialog1 as new mscomdlg.commondialogcommondialog1.defaultext = ".udl"commondialog1.filter = "通用数据链接文献 (*.udl)|*.udl"commondialog1.dialogtitle = "生存为通用数据链接文献"commondialog1.flags = cdlofnoverwritepromptcommondialog1.cancelerror = trueon error goto errorhandlercommondialog1.showsaveon error goto 0s = "[oledb]" & vbcrlf _& "; everything after this line is an ole db initstring" & vbcrlf _& s & vbcrlfdim bytesbuffer() as bytebytesbuffer = vba.strconv(vba.strconv(s, vbunicode), vbfromunicode)dim i as longredim bytesbuffer0(1) as bytebytesbuffer0(0) = 255 解释：&hffbytesbuffer0(1) = 254 解释：&hfeif vba.len(vba.trim(vba.dir(commondialog1.filename))) > 0 thenvba.kill commondialog1.filenameend ifon error goto errorhandleri = vba.freefileopen commondialog1.filename for binary access write as #iput #i, , bytesbuffer0put #i, , bytesbufferclose #ion error goto 0if vba.msgbox("test?", vbyesno) = vbyes thendim adoconnection as new adodb.connectionadoconnection.open "file name=" & commondialog1.filenamevba.msgbox "ok!"end ifend ifexit suberrorhandler:if err.number <> 91 and err.number <> 32755 thenvba.msgbox err.number & ":" & vbcrlf & err.descriptionend ifend subprivate sub command2_click()dim commondialog1 as new mscomdlg.commondialogcommondialog1.defaultext = ".udl"commondialog1.filter = "通用数据链接文献 (*.udl)|*.udl"commondialog1.dialogtitle = "打开明用数据链接文献"解释：commondialog1.flags = cdlofnoverwritepromptcommondialog1.cancelerror = trueon error goto errorhandlercommondialog1.showopenon error goto 0if vba.len(vba.trim(vba.dir(commondialog1.filename))) > 0 thenvba.msgbox getconnectionstringfromudl(commondialog1.filename)end ifexit suberrorhandler:if err.number <> 91 and err.number <> 32755 thenvba.msgbox err.number & ":" & vbcrlf & err.descriptionend ifend subpublic function getconnectionstringfromudl(udlfilename as string) as stringif vba.len(vba.trim(vba.dir(udlfilename & ""))) > 0 thendim bytesbuffer() as byteredim bytesbuffer(vba.filelen(udlfilename) - 133) as bytedim i as longi = vba.freefileopen udlfilename for binary access read as #iget #i, 129, bytesbufferclose #igetconnectionstringfromudl = vba.trim(vba.strconv(vba.strconv(bytesbuffer, vbfromunicode), vbunicode))end ifend function