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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.

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Reverse DNS

Question: If I can use the “InetAddress” class to acquire the IP address of a computer, is there a way to get the computer’s name from an IP address? Answer:

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Using errno in DLLs

C++ inherited from C the global variable errno which indicates the success status of a previous operations. An errno value of 0 indicates that the previous operation was successful whereas

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The vector::data() Member Function

In a previous tip, I discussed techniques for treating a vector object as an array. The two main forms of obtaining the internal array’s address are: &*v.begin(); // obtain address

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Uninitialized enum Variables

The value of an uninitialized automatic enum variable is indeterminate. Uninitialized global and static enum variables have a zero value by default. In this regard, enum variables are similar to

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The Modulus Operator

The operator % returns the remainder of dividing its two operands. For example: b=10%3; // b equals 1 Don’t confuse the modulus operator with the division operator: c=10/3; // division,

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Designing Custom Forms

Question: Is it possible to make changes to the text on the tabs? Answer: Sure, with the tab you want to change selected, just click Form > Rename This Page.

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Informix Backups Error Message

Question: We have Informix IDS 7.30 running under SCO 5.0.5. Backups by ontape fail with an error: “I/O read chunk 90, pagenum 2, pagecnt 1 –> errno = 9″But when

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Locking a Row

Question: How can I lock a row in a table from a stored procedure? Answer: You shouldn’t have to worry about locking. It’s done automatically by the engine when you

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Upgrading from AIX 4.2 to AIX 4.3

Question: We have plans to upgrade our AIX operating system to version 4.3. We are using Informix 7.31. Do we need any new Informix components (compilers etc.)? Answer: You probably

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SQLLog Wizard

The SQLLog Wizard is used to specify which tables are to be audited. The output of the wizard is a SQL script that that can be run in the Query

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Oracle OLE DB and MTS

Trying to figure out how to use the Oracle OLE DB Provider under MTS or COM+ and with Oracle’s OS Authentication? This article explains how these parts fit together and

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Image Changeovers

Question: I have seen plenty of text on script dealing with mouseovers, or ‘animation’ where an image can change every few seconds, but is there a way I can write

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Form Validation

Question: I need to perform a validation on five fields in a form. The logic is: If field1 length >0 then disallow form submission if field2,field3, field4, and field5 are

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Pop-up Window with Links to New Pages

Question: I want to set up a series of links in a pop-up window which, when clicked, will (a) close the popup window and (b) redirect the main page to

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Checking the State of a Stream

The iostream family of classes provides the following member functions and operators for checking the stream’s state: bool good() // returns true if no error flag is setbool eof() //