devxlogo

We are an award-winning tech entrepreneurship website where trusted experts can provide value globally.

Since 1998, DevX has helped people start businesses, build websites, and provide enterprise technology to people globally. Interviewing the likes of Microsoft’s co-founder, Steve Ballmer, the publication brings comprehensive, reliable, and accessible insights to the Internet.

devxlogo

Trusted for 26 years

Over 30K Articles

1M+ Readers

Expert-reviewed

10K+ Tech Terms

As seen in:

microsoft logo
business_insider_logo
wired_logo
berkley
arstechnica_logo
hackernoon

The Latest

Generate Beeps in Your Application

Many applications use an audible “beep” sound to signal that an error has occurred or to get the user’s attention for some reason. For example, a user interface that allows

Assigning Integers to an Enum Type

In C, it is valid to assign integers to an enumerated type. For example: /*** valid in C but not C++ ***/enum Status {good, bad};void func(){ Status stat = 1;

Initialize a Radio Button

Question: Is there a parameter that can be used within a radio button tag in an HTML form to set the default value for the radio group? Answer: The CHECKED

Processing a Transaction on One or More Remote Servers

In SQL Server 6.5, this command specifies that a distributed transaction managed by Microsoft Distributed Transaction Coordinator (MS DTC) starts and the transaction_name specifies a user-defined transaction name that is

Prevent Lenient Date Parsing

The java.text.DateFormat class and its java.util.SimpleDateFormat subclass are useful for formatting and parsing date and time values. For example, your application may allow a user to enter a date value

“Disable” the Browser’s Back Button

While there is no way to specifically disable the back button from within the browser, you can shortcut the navigation to another page. The trick is to catch the onbeforeunload

Shockwave Flash and DHTML

Question: How can I make a Shockwave Flash movie run over or under a DHTML DIV tag with text inside? I tried to use z-index but it doesn’t work well

Generate a DHTML Message From a Database

Question: I am working with Microsoft DHTML and when I insert the content of a field in a DHTML document, I lose part of my message. For example, suppose I

List All Network-Visible SQL Servers

To enumerate all network-visible SQL servers using SQL-DMO objects, create a new standard EXE project and add a reference to sqldmo.rll. This file can be found in BinnResources1033sqldmo.rll under the

Retrieve a List of Available Serial Ports

Here’s a nice little function that retrieves a list of the available serial ports on your system. Note that this function uses Java’s Communications API, also known as javax.comm, which

ForceTextBoxNumeric – Create a numeric Textbox

Private Declare Function GetWindowLong Lib “user32” Alias “GetWindowLongA” _ (ByVal hWnd As Long, ByVal nIndex As Long) As LongPrivate Declare Function SetWindowLong Lib “user32” Alias “SetWindowLongA” _ (ByVal hWnd As

ForceTextBoxCase – Set a textbox’s upper/lowercase style

Private Declare Function GetWindowLong Lib “user32” Alias “GetWindowLongA” _ (ByVal hWnd As Long, ByVal nIndex As Long) As LongPrivate Declare Function SetWindowLong Lib “user32” Alias “SetWindowLongA” _ (ByVal hWnd As

GetTempFile – Create a temporary file

Private Declare Function GetTempFileName Lib “Kernel32” Alias _ “GetTempFileNameA” (ByVal lpszPath As String, _ ByVal lpPrefixString As String, ByVal wUnique As Long, _ ByVal lpTempFileName As String) As LongPrivate Declare

ObjFromPtr – Return an object from its pointer

Private Declare Sub CopyMemory Lib “Kernel32” Alias “RtlMoveMemory” (dest As _ Any, Source As Any, ByVal bytes As Long)’ Returns an object given its pointer’ This function reverses the effect

Passing Named Arguments to Java Programs

Here’s an example of a better way to pass arguments to main() methods of Java classes than using String[] args. First, pass two named parameters, user and level, that come

Watch How You Use Your Booleans

With the introduction of the Boolean data type in VB4, you might be tempted to convert it to a numeric value using the Val function for storage in a database

Numeric Conversion of Strings

When dealing with numerics and strings, be advised of a couple “gotchas.” The Val() function isn’t internationally aware and will cause problems if you have users overseas. But you can’t

Simplify Boolean Variable Updates

Instead of using an If construct to set a Boolean variable, you can assign a Boolean variable to the result of any logical comparison. For example, instead of this code:

SQL Trick to Join Multiple Select Statements

Don’t overlook the UNION keyword in SQL as a way to simplify selections from multiple tables. For instance, to select the customer with the highest sales from three tables with