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COM+ centric Assert

INTRODUCTION In my latest article here at VB2TheMax, I showed my code structure for COM+ components (Example of code structure for COM+ component) in preparation for a couple of debug

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Beware of the Dictionary object in ASP pages

The Scripting.Dictionary object is marked as having a “Both” threading model, which means that you can freely assign it to a Session or an Application variable. However, the actual threading

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Don’t mix script languages on the same page

You should never use more than one script language on the same ASP page, for example by mixing pieces of VBScript with portions of JavaScript. The reason is that there

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Tricks with Server.MapPath

The Server.MapPath method can be used to retrieve several interesting properties about the running ASP application, for example: ‘ the current directorycurrDir = Server.MapPath(“.”)’ the parent directoryparentDir = Server.MapPath(“..”)’ the

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Response.Buffer and Response.Flush

In order to redirect a web page after you have written to it, you must use a Response.Buffer = true at the top of the page.You may redirect the page

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Unload Forms

This will unload all forms in memory before the calling form is unloaded. Not only does this unload each form, it also fires each form’s unload event, allowing for a

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Registering Custom Interfaces

When the object exposes the custom interfaces via standard marshalling, the proxystub DLL is required for marshalling data across the threadprocessescomputer boundaries.The interfaces are specified in an IDL file that

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Convert an Input String Into a Proper String

If you want to convert the input string into a proper string usingjavascript, this is a simple function that will perform the task: String.prototype.ProperCase = function() { return this.substr(0,1) .toUpperCase()

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Basic Event Logging

Any production application should include event logging for troubleshooting and auditing purposes. This code can be placed in any module and called whenever you have an error or event that

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GetPrimaryDCName

Question: I’m trying to get the PDC name for a domain on my network using the following code. It works fine within the VB IDE, but the moment I compile

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NetUserGetInfo – API Call

Question: I am using “NetUserGetInfo” API call to get the NT user profile. I use: typedef struct _USER_INFO_3 How can I parse the “usri3_flags” member in detail? Answer: Use this:

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Maximum Number of Columns Allowed

Question: What is the maximum number of columns allowed in an Informix table? Answer: For Informix 7.3X, the maximum number of columns in a table is 2,767.

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Changing the Environment Inside a Program

Question: How do I change the environment inside a program (filename.4gl)? Example: setenv TBCONFIG $tbconfig.01 Answer: I don’t think you can do it. If you’re running a 4gl program, you

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Informix 4GL Translators

Question: I want to purchase some software that will translate Informix 4GL to any of the following: Java, C, C++, or Perl. We have two applications that we need to

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The const pass-by-value

Question: void foo(const int x) { // not altering x} Herb Sutter in Exceptional C++, pg.177 says, “const pass-by-value is unuseful and misleading at best.” I disagree, at a glance

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Can 16-Bit Software Run in Windows 2000?

Question: Can 16-bit software run in Windows 2000 platform? Answer: The answer is yes and no. Many 16-bit software programs run just fine in W2K, as they did in NT

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JavaScript Not Working with IE 5.5

Question: Why will this code not work with IE 5.5? Answer: It’s not a question in this case of JavaScript not working with IE 5.5, but of Java not working

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Deprecated APIs

Question: How do I make a method deprecated? Answer: Deprecating a method or entire class is as simple as using the “@deprecated javadoc” tag in its documentation. For example: /**

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Using cin.good() to Check Inputted Numbers

Question: I’m trying to make a calculator program using switch statements for +,-,* and /. I know how to handle and divide by zero error. I also have to use

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Loading a New Window from a Frame.

Question: I have a frameset that consists of two frames. The top frame is a horizontal frame that displays a bulletin message in a banner if there is some sort

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Passing Value to an Online Form

Question: Is it possible to use JavaScript to create a custom page and pass all the values in the page to an online form such that I do not have

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Significance of const Return

Question: What is the significance of const return type from a function?Similar to: const int func1(); Answer: The const in this position guarantees that the caller of the function doesn’t

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Java Profiler

Question: Is there a profiler like JProbe which supports the Microsoft Virtual Machine? I already tried the -prof switch on the command line, but that doesn’t do everything I need.