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General Concepts
What is the big deal with using web-based applications?
Building web-based applications has many advantages including
cost effectiveness, communications efficiency and readily available to everyone within your organization - if you decide. Software
deployment can be fully automated, there is no need to go to a client computer to install anything! when a user browses your
website, the software can be automatically downloaded to their computer. Training time will be reduced also, because most people
today are already familiar with internet technology.
What is VBscript?
VBscript is a subset of Visual Basic. Visual
Basic is a programming language for developing applications whereas VBscript is a scripting language for web-applications
development.
What is ActiveX?
ActiveX is a technology that is "component
based". Instead of purchasing applications to do a job for you, you can purchase code that somebody else has created and use
it to fit your requirements. More information about this subject can be found here.
What is OPC?
OLE for Process Control is a standard for automation software communications. We have a technical white
paper available here and an easy to read version here.
Web Browsers
Which browsers can I use?
Internet Explorer only. For more information, click here.
Which versions of IE are compatible?
There are some issues with some versions of IE. Make sure that your version of
IE is listed below:
Compatible: IE 3.x, IE 4.x, IE 5.5, and IE 6.0.
NOT compatible: 5.0, IE 5.0SP1, or IE 5.01SP2
Can I use Netscape Navigator instead of IE?
No you can't. Click here for more information.
HTML & VBscript
How do I use ActiveX controls in a web page?
We have a step-by-step learning guides available:
Instrumentation ActiveX control users - click here
Does VBscript have access to the same Events as Visual Basic?
Yes it does. Click here for a step-by-step Getting Started guide with an example.
How do I change text values on the fly within a web-page?
Text and objects are perceived as static and unable to change.
This is not true. Thanks to the <DIV> tag in HTML, you can change text values on the fly using VBscript. Click here for a step-by-step Getting Started guide with an example.
Is it possible to have more than one ActiveX component on a single web-page?
Yes it is. Simply use the
<object>..</object> tags for your first control, and then place the next <object>..</object> tags elsewhere
- before or after the other <object> tags. Be sure NOT to place one <object> tag inside the other.
Can I use the ActiveX controls with Active Server Pages (ASP)?
Yes you can.
Security
How does Internet Explorer determine if ActiveX controls are safe?
Microsoft has a document that explains this and is available here.
How do I stop an ActiveX control from running in Internet Explorer?
Microsoft has a document that explains this and is available here.
ActiveX and ActiveX Licensing
Can I get a list of Class IDs for the Instrumentation ActiveX controls?
We have a list of Class IDs for the Instrumentation ActiveX controls here.
What else is compatible with the Instrumentation ActiveX controls?
We have a technical document available here.
Do I need to purchase additional ActiveX licenses when deploying to the web?
This does depend on what you are
deploying... the ActiveX is actually 2 components, the ActiveX and the OPC client.
If you use the ActiveX without the OPC
connectivity, then you will not need to purchase additional deployment licenses.
If you deploy the ActiveX and your application
uses the OPC connectivity, then you will need to purchase additional deployment licenses.
More information about licensing is available here.
How do I use licensed ActiveX controls in Internet Explorer?
We are currently writing a Getting Started guide for
licensing ActiveX controls for Internet Explorer. Click here to read the technical document by Microsoft.
How do I create my own CAB files?
We are currently writing a step-by-step Getting Started guide for creating your own CAB
files for deploying ActiveX controls.
Are the CAB files already created?
CAB files currently exist for the Instrumentation ActiveX control products and are
availablehere.
How do I create a license file for ActiveX controls?
We are currently writing a step-by-step Getting Started guide
for creating license files for your ActiveX controls in Internet Explorer.
Where can I download the tool for creating a license (LPK_Tool)?
You can download the LPK_Tool right
here. Click here to go to the Microsoft website for instructions on how to use this application.
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