VBScript Reference Manual for InduSoft Web Studio - ICP DAS

InduSoft Web StudioVBScript Reference ManualTable of ContentsAbout VBScript......................................................................................................................................5VBScript Limitations in IWS..................................................................................................................7The Microsoft Visual Basic Family.........................................................................................................8Differences between VBScript and VBA ................................................................................................9VBScript Hosting Environments...........................................................................................................10VBScript Language Overview ..............................................................................................................11VBScript Functionality .....................................................................................................................11VBScript Elements ...........................................................................................................................11Variable Data Types and Subtypes....................................................................................................12Data Subtype Identification...............................................................................................................12Data Subtype Conversion..................................................................................................................12Variable Naming Rules & Conventions.............................................................................................13Variable Scope..................................................................................................................................13VBScript Constants...........................................................................................................................13Declaring VBScript Variables and Constants ....................................................................................14VBScript Keywords..........................................................................................................................14Operators ..........................................................................................................................................14Operator Precedence .........................................................................................................................15Functions ..........................................................................................................................................15Statements ........................................................................................................................................18Objects and Classes ..............................................................................................................................21VBScript Object Commands.............................................................................................................23VBScript User-Defined Class Objects...............................................................................................24VBScript Objects and Collections.....................................................................................................28Err Object .....................................................................................................................................29Scripting Dictionary Object...........................................................................................................30Scripting FileSystemObject...........................................................................................................31COM Objects and Collections...........................................................................................................39VBScript Configuration and Operation in IWS .....................................................................................43Global Procedures.............................................................................................................................45Graphics Script .................................................................................................................................46Screen Scripts ...................................................................................................................................47Command Dynamic ..........................................................................................................................49ActiveX Events.................................................................................................................................50Background Task Startup Script........................................................................................................51Background Task Script Groups........................................................................................................51Scope of VBScript Procedures and Variables....................................................................................53Accessing IWS Tags and IWS Built-in functions ..............................................................................55Accessing ActiveX Objects from VBScript.......................................................................................58IntelliSense .......................................................................................................................................60VBScript with Web Thin Clients.......................................................................................................62VBScript Language Reference..............................................................................................................63VBScript Variables...........................................................................................................................64Variable Data Types and Subtypes................................................................................................64InduSoft, Ltd. 3