VBScript Reference Manual for InduSoft Web Studio - ICP DAS

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VBScript Reference ManualInduSoft Web StudioInteraction with the ActiveX control from VBScript is accomplished through VBScript code placed in aScreen Script that is associated with the screen where the ActiveX control is placed. By entering a rightmouse click on a blank portion of the screen, and selecting Screen Script, the Screen Script isaccessed. For ActiveX Objects placed on the screen, you do not need to instantiate the Object inVBScript, IWS has already taken care of this. You simply need to reference the ActiveX control by itsname, found in the Object Properties dialog box. Note: when referring to the name from VBScript,the ActiveX control name is case sensitive for IWS versions 6.1 SP1 and earlier. From theVBScript screen interface, you can access the ActiveX control’s Properties and Methods. Events arenot accessible from the VBScript Screen Script interface. The ActiveKey Notes:• You must use the VBScript Screen Script interface for the screen which contains theActiveX control in order to access the ActiveX control’s Properties and Methods. Youcannot access the ActiveX control’s Properties and Methods from another ScreenScript, or from any other VBScript interface in IWS.• From VBScript, you can only access the ActiveX control’s Properties and Methods.VBScript code segments for Events that are triggered by the ActiveX control can beentered, but these VBScript code segments must be entered from the Configurationdialog box (i.e. Object Properties Configuration Events).• When the ActiveX control is referenced from the VBScript Screen Script interface, theActiveX control’s name is case-sensitive for IWS version 6.1 SP1 and earlier.• You do not need to instantiate the ActiveX control. IWS has already taken care of this.Simply refer to the ActiveX control name followed by a “.” and then the Property orMethod.• In the VBScript Screen Script interface, place the cursor in a code segment area(Subroutine) and press Ctrl –Space to invoke IntelliSense to see the VBScriptstatements and functions, as well as the ActiveX controls available for this ScriptInterface.• Once you enter the ActiveX control object name, when you type a period (“.”),Intellisense will display a list of available Properties and Methods for the ActiveXcontrol referenced.Additional information on this topic is covered in the VBScript Configuration and Operation in IWSsection later in this material.ActiveX Controls Instantiated from VBScriptActiveX controls can be instantiated from VBScript by using the CreateObject and referencing theProgram ID (ProgID) of the ActiveX object, although the ActiveX object will not show up on the IWSscreen if the script segment is associated with a Screen.ADODB and ADOX Objects and CollectionsADODB is the database wrapper for ADO.NET, or ActiveX Data Objects for Microsoft’s .NETFramework. ADO.NET is Microsoft’s database interface technology that provides an API to databaseclient applications (i.e. IWS and VBScript), supporting a common interface to access and manipulatedata contained in a wide variety of database servers from different vendors. From the database clientside, there is a level of abstraction provided by the API that enables interaction (e.g. database accessand manipulation) to various vendor’s databases with virtually no code changes, except for the40 InduSoft, Ltd.
InduSoft Web StudioVBScript Reference Manualconnection string to the database Provider (an object that interacts with the physical database). Thereare various ADODB Objects and Collections available to the developer.ADOX is Microsoft’s ActiveX Data Object Extensions for Data Definition Language (database schemacreation, modification and deletion) and Security. It is a companion set of Objects to the core ADO.NETobjects.Microsoft Office AutomationVBScript can access the various Microsoft Office Automation COM servers. These include:• Microsoft Access (“Access.Application”)• Microsoft Excel (“Excel.Application”)• Microsoft Word (“Word.Application”)• Microsoft Outlook (“Outlook.Application”)• Microsoft Graph• Microsoft Excel Chart (“Excel.Chart”)To instantiate a Excel and a Word Application, for example, we would use the following VBScriptstatements:Set objXL = CreateObject(“Excel.Application”)Set objWrd = CreateObject(“Word.Application”)Once the Microsoft Office COM object is instantiated, the VBScript Programmer can access the variousProperties and Methods. Using VBScript, objects can be moved from one Microsoft application toanother.WMIWindows Management Instrumentation, or WMI, is a set of extensions to the Windows Driver Modelthat provide an interface from a program (such as VBScript) into various components of the Windowsoperating system to retrieve information and notification. Using WMI and VBScript, management ofWindows-based PCs and Servers can be accomplished either locally or remotely. WMI is based on theCommon Information Model (CIM), allowing a uniform methodology of managing various Windowscomponents. WMI is available to all .NET applications and is supported under Windows 2000, XP orServer 2003, but not Windows CE at present. Examples of Microsoft Windows components accessiblethrough WMI include:• Control Panel (can manipulate basic system settings and controls)• Device Manager (display and control hardware added to the PC, which drivers are used)• Event Viewer (view the system event log locally or remotely)• RegEdit (Windows Registry Editor)• Various applications (Notepad, Command.Com and Cmd.exe)• Windows Core ComponentsWindows Script HostWindows Script Host, or WSH, is the successor to the Batch File first introduced for DOS. WSHautomates system administration tasks, and supports multi-lingual scripting including VBScript. Scriptscan be run locally, or on remote computers. There are several WSH objects including:• WScript Object (not available from IWS, since IWS is the host)• WshShell (allows scripts to work with the Windows Shell – e.g. read/write to registry, shortcuts,system administration tasks, running programs)• WshNetwork (manages network drives and printers)• WshController (runs scripts locally or remotely)InduSoft, Ltd. 41
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