September 24, 1999

Registering DLLs in DHTML Applications

Question: I’ve just started using DHTML in Visual Basic 6.0 and have encountered a few glitches. When using ActiveX DHTML, where does the compiled DLL file have to be stored (filed) so that the HTML file that is subsequently produced can use it? When registering the DLL file produced in

Place Image in an Absolute Position

Question: I’ve been using the Microsoft ActiveX image control to place my images in absolute positions on my Web page. However, I have run into problems with this image component on some PCs. I have tried to reregister the ISCTRLS.OCX, which contains this component, but this does not help. Can

The Advantages of XML Over CSV

Question: What is the advantage of XML over say, a comma delimited file? If you’re using it for data transfers between platforms, I would think that always having to explicitly tag each data element adds unnecessary overhead to your data file. Trust me, I want to be wrong here?I know

Creating Images on the fly with ASP Pages

One of the impressive features of Active Server Pages is the ability to deliver fresh, active content in direct response to user input. In addition to creating responsive text, you can also generate graphics on the fly. My favorite tool is a server-side component called FontVelocity from Vertigo Software. (

Check Browser Compatibility Before Using Visual InterDev Design-Time Controls

Microsoft’s Visual InterDev 6 is an excellent environment for developing Web applications. The use of Design-Time controls (DTCs) to create script objects has revolutionized HTML coding. However, even server-side DTC-generated code can get you into trouble if you are supporting Internet Explorer 3.0, Internet Explorer 3.01 or Netscape Navigator 2.x.The

Explicitly Declare Your Variables in Separate Lines

It is good practice to explicitly declare the variables in separate lines. For example, declaring all the variables in one line like, Dim a, aa, aaa As String, will declare aaa as a string variable but will declare a and aa as variants. The proper way to declare the variables

Control ASP Caching in 4.0 Browsers, IE 5, and Proxy Servers

Trying to deliver fresh, active content through Active Server Pages can be a real challenge. Browsers and some proxy server insist on caching older versions of your pages. You made need a “shotgun” approach to handle all of the situations in which your ASP content can get cached. Try putting

Execute DOS and Windows Programs from ASP

Although it is usually more efficient to use a Dynamic Link Library (DLL) that meshes well with the Internet Information Server (IIS) and Active Server Pages (ASP) environment, you may just need to run an old DOS application via an ASP page. Stephen Genusa offers just such a component that

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