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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.
At times you may need to swap the values of two columns of the same SQL Server table. For example, suppose that you realized that the fname column of the
The SQL language includes the SUM() aggregate function, that evaluates the sum of all the values in a given column, but it doesn’t include a PROD() function that evaluates the
Private Declare Function SystemParametersInfo Lib “user32” Alias _ “SystemParametersInfoA” (ByVal uAction As Long, ByVal uParam As Long, _ ByRef lpvParam As Any, ByVal fuWinIni As Long) As LongConst SPI_SETDESKWALLPAPER =
At times you may need to verify that the VB IDE is the current process. This is necessary, for example, when you are notified that the user has presses a
‘Check if the specified OLEDB Provider is installed and registered correctly”Example: check the Jet 4.0 OLEDB Provider’MsgBox “The specified OLEDB provider ” & ‘ IIf(CheckOLEDBProvider’ (“Microsoft.Jet.OLEDB.4.0”), “does”, “does not”) &
Printing is one of the things that you can’t do directly from withing ASP: to have a printout of your data from ASP you must instantiate a COM component –
When you use a COM or COM+ from a .NET application and then you set the object reference to Nothing (or let it go out of scope), the object isn’t
‘ get the IE installation path, or a null string if it isn’t installed” NOTE: requires the GetRegistryValue routineFunction InternetExplorerPath() As String Const HKEY_LOCAL_MACHINE = &H80000002 ‘ get the path
The Slider control has a capability that you might ignore: you can assign its SelectRange property to True to enter Select Range mode, during which the user can use the
One of the most effective optimization techniques consists of caching data inside Application or Session variables. However, you should pay attention to how you reference to the elements in those
Editor’s Note: This article discusses a new feature in the Microsoft Visual C++.NET compiler, which at the time of publishing was still in beta. The features described may change before
The NeoCalender Library consists of two ActiveX Controls, developed by Neo Components, which are designed to replace the MonthView and DTPicker controls that ships with VB. These two controls are
‘ Concatenate the input strings, and return the resulting string. The first ‘ input string is used as a separator.” Example:’ Dim i As Integer = 4′ Dim d As
In VB6 there was no easy way to create multiline tooltips for form controls, you necessarily had to resort to API tricks. And it was probably just not worth the
To add an image as an embedded resource in a Windows Forms application, add the image file to the project with Project | Add Existing Item. Then select the file
When you start developing an application, the first thing you do in VS.NET is creating a new project and selecting its type: Windows Forms application, Class Library etc. However, it
If you have a string variable that should specify a date (asked in input to the user, for example), you can parse the string and get a Date variable by
You can know the state of the Shift, Alt and Control keys at any time, not just from inside a Keyxxx event. The shared property Control.ModifierKeys returns a bit coded
Final – For Release December 17, 2002 New Eclipse Project Addresses Automated Software Quality Open-source framework is basis for extending development platform to support deployment evaluation “Project Hyades” Builds upon
eflection in .NET is an exciting new tool for most developers. This article shows you how to use reflection to discover objects at runtime that you did not know existed
xecuting code dynamically at runtime is a powerful tool to allow users to customize applications after deployment. .NET provides all the tools that make it possible to build code on
solated storage represents a subset of the file system that partially trusted applications can access to perform their private I/O operations. Introduced to preserve the integrity and the functionality of
ondering what I would dig up in the JDK 1.4 source code, I recently started looking through the classes in the java.util.* package?without even the subpackages. That alone kept me
hat you are involved in at Microsoft and what changes have been made in the security arena? Steve Lipner: The Secure Windows Initiative (SWI) was created in early 2000, right
he process of securing applications begins with understanding the threats against your applications. Portions of this article are excerpted from Writing Secure Code, 2nd Edition, available from Microsoft Press. A
he .NET Framework introduces advanced free threading as a fundamental building block. The Framework offers solutions even for advanced issues, enabling developers to build truly thread-safe applications in a relatively
nless you are clairvoyant, finding what you need in the Visual Studio .NET documentation can sometimes be a daunting task. The Doc Detective is here to help, gazing into his
n part 1 of this series you learned how PERL has been incorporated into the Visual Studio .NET family. This article explores its membership in more detail. PERL and its
Use this function for getting the 10th next element from an array with “circular” contents such as “Monday,” “Tuesday,” and so on: intCurrent = WrapIndex(Index:=intCurrent, _ Move:=+10, UpperBound:=6) You don
VB6 introduced a new Style=5-tbrDropDown of the Button object for the ToolBar control. In this case, you can add one or more ButtonMenu objects to the current Button. Unfortunately, you
