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The Latest

Count Substrings

This little routine demonstrates how easily you can determine the number of substrings within a string, given any specified separator character(s). Pass the string to be parsed, and the separator,

Killing an Object Prematurely

Sometimes, you need to force an object to destroy itself because its destructor performs an operation needed immediately. For example, when you want to release a mutex or close a

Construct Shortcut to an Interface

hen using a class that implements an interface, it can be frustrating to have to create two variables to reference all the properties of both the interface class and the

Access Your Help and Ini Files Within VB

In small projects I am involved with, I frequently access project-related INI files and help files. At times I work with identical databases on Access and SQL Server, so I

The New __FUNCTION__ Macro

In addition to the traditional macros __DATE__, __LINE__, and __FILE__, which are defined by ANSI C, the new C9X Draft Standard also defines the macro __FUNCTION__. __FUNCTION__ is expanded as

Is it Possible to Decompile an Executable?

Another frequently asked question in C++ newsgroups: “Is there a tool that decompiles an executable program back into C++ source code?” The short answer is “no, there isn’t”. The longer

Force an Object to Destroy Itself

Sometimes, you need to force an object to destroy itself because its destructor performs an operation needed immediately. For example, when you want to release a mutex or close a

Determine Visible Part of a Window

Programmers often need to know whether only a part of a window is visible. This can require a difficult calculation with coordinates. Use this routine to easily determine the visible

Problems with ADO

Question: I was out on the Fox newsgroup and somebody posted some ADO code in Visual FoxPro that alarmed me. VFP seems to have a major problem repeatedly accessing the

Limited Dynamic SQL

Question: I am a technical copywriter currently writing a fact sheet for a software company providing DB2 SQL support. They have something they want to call “limited dynamic SQL.” Here’s

Comparing Columns from Different Tables

Question: I have a problem comparing columns from different tables. I tried: SELECT tblThumBereinigt.Nummer, dbo_BABEWERTUNG.BANUMMERFROM dbo_BABEWERTUNG, tblThumBereinigtWHERE (((dbo_BABEWERTUNG.BANUMMER)[tblThumBereinigt].[Nummer])); but this does not give me what I want. How can I

SQL Syntax

Question: How difficult is it to convert a Sybase Transact-SQL database to SQL/400, and where can I find information on SQL/400? Answer: I don’t know but, in the main, learning

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