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The Latest

DTS & Data Driven Query Task

Question: I am trying to import data from a .CSV file and verify that the rec importing does not exist on the destination database (SQL7 DB), then either insert or

Comparing Two Tables

Question: How do I compare two tables and extract only where field1 doesn’t match field2? Will MINUS do it? Answer: Yes, but it’s not that direct. To do MINUS (or

Auto-Replying from a Specific Account

Question: How can I configure Exchange Server for simple automatic replies when e-mails are sent to a specific account? Answer: The easiest way to do this is to log in

Using DTS

Question: Is it possible to create a DTS package that does an Update rather than a Select statement? Also, when I save a DTS package in a file (*.dts as

Restoring Tables

Question: Does SQL 7.0 allow you to restore a table from a database dump much the way SQL 6.5 did? Answer: No, not exactly. The only way you can restore

Exchange Temp Files

Question: My Exchange server has two partitions (C and D). There is a file (TEMPDFRAG.EBD) that is on the C drive and is taking up a lot of space. Is

Exporting from FoxPro 3.0 to 2.6

Question: I have a table in FoxPro 3.0 that I need to export to FoxPro 2.6 to give to someone outside my company. However, when I export, the memo fields

MTS and Passing Direct Reference

MTS objects clients should never have access to unsafe references. A client application should never be passed a direct reference to an MTS object. Once such a reference is passed

Exception in Destructor

Question: If an exception is thrown in a destructor will the data objects in the class be destructed properly? Answer: Throwing an exception from a destructor is a bad idea

string.h

Question: I am a beginner with C++ programming. I was doing fine until I came to the string data type. Here is my problem: #include #include This gives me errors.

Strong Types

Question: How do you make the compiler generate an error when a variable is set to a value outide the range of the constrained type? For example; strong x; //strong

Using the ?: operator as opposed to if…else…

Question: Is there a problem with using the ?: operator instead of the if…else… construct? For example, see the following: if(iNum1 > iNum2) iNum3 = iNum1;else iNum3 = iNum2; The

Introspection of classes

Question: In Java using the java.lang.reflect classes, one can find out the name, class, and methods of an object simply by having a reference to that object. Is there a

Calculating interest without floating types

Question: How can you caluculate interest using only integers and no double or floats? Answer: This question can be of interest for anyone who is confined to ineteger arithmetic. Many

Passing a unction as an argument

Question: How do I pass a function as a parameter? Answer: First, let’s distinguish between a parameter and an argument. The parameter is the type of the object passed. An

C++ objects

Question: How can I declare a constant object that is actually constant? Answer: Here’s an example: const Date d; //create a const Date object Note that you can only invoke

anonymous unions

Question: I’m trying to find information regarding anonymous unions in C++. I hear that in C++, one is able to declare a union such as: union example{ int a; int

Inheritance and Memory Allocation

Question: I can’t create an instance of the derived class using operator new. The base and the derived classes differ only by a virtual function. The error messages I receive

Quickly initialize Variant and String arrays

Visual Basic doesn’t provide any way to declare an array and initialize its elements at the same time. In most cases you end up with setting individual elements one by

Replace the last occurrence of a string

Here is a one-liner that replaces the last occurrence of a substring in a string. It is slightly less efficient than using the InstrRev plus a Replace statement, but at

Count substrings with the Replace function

You can often use the Replace function in a smewhat unorthodox ways to simplify (and sometimes optimize) your code. For example, in order to count the number of occurrences of

Avoid append operations with the Replace function

I find the Replace function very useful when I want to avoid too many append operations just to insert non-printable characters. For example, the following statement: MsgBox “Disk not ready.”

Extract null-delimited strings

Most API function that return a string require that you pass a buffer where they can place the result as a null-terminated ANSI string (a.k.a. ASCIIZ string). The calling code

Using NetAddUsers

Question: I created a program to Add User Account to my NT Server. It reads from a text file which provides the user info. Everything works fine, except that the

Accessing a Workstation in a Domain

Question: I would like to know how to access a workstation which is configured and logged on to an NT domain, from another PC in a workgroup environment? Most of

Concatenate Variables Containing Numbers

Question: I need to know how to concatenate variables containing numbers, that is, string them together one after the other. Every method I know simply adds the various numbers together