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Restrict a Textbox to Accept Only Numbers

Sometimes we may need to restrict users from entering anything besides numbers in a textbox. The following code can achieve this: Option ExplicitPrivate strClipboardText As StringPrivate Sub txtNumberBox_KeyPress(KeyAscii As Integer)

Concatenating Big Strings

Please note that using the join function makes this code VB6 only (for only a small performance gain). dim i as longdim s as stringfor i = 0 to 100000

Determine Whether a User Session Has Expired or Been Removed

Define a class, say SessionTimeoutIndicator, which implements theinterface javax.servlet.http.HttpSessionBindingListener. Next create a SessionTimeoutIndicator object and add it to the user session. When the session is removed, the SessionTimeoutIndicator.valueUnbound() method will

C++ Exceptions Will Not Cross COM Boundaries

When writing a COM object using C++, care should be taken to ensure that all C++ exceptions generated by the code are handled within the call itself. If any C++

DB2 UDB V7.1

This tip provided by Experts Exchange DB2 UDB V7.1

Get Recordset from Stored Procedure on DB2

This tip provided by Experts Exchange Get Recordset from Stored Procedure on DB2   This tip provided by Experts Exchange.     Question: This is code:          Record Count: #RS1.RecordCount#

DB2 UDB V7

This tip provided by Experts Exchange DB2 UDB V7

DB2 SQL

DB2 SQL <![if !supportEmptyParas]> <![endif]> This tip provided by Experts Exchange. <![if !supportEmptyParas]> <![endif]> Question: where can i find an equivalent of TOAD client (oracle) orSQL Navigator for DB2 Database? the db2

DB2 UDB V7 (Sequence Number)

This tip provided by Experts Exchange DB2 UDB V7 (Sequence Number)   This tip provided by Experts Exchange.   Question: How can I add a sequence number to a target

DB2 UDB V7 (Inserting into Identity Columns)

This tip provided by Experts Exchange DB2 UDB V7 (Inserting into Identity Columns)   This tip provided by Experts Exchange.   Question: I am working with DB2 UDB v7 and

DB2 in AS/400 to Oracle?

Hi all, DB2 in AS/400 to Oracle?   This tip provided by Experts Exchange.   Question: Hi all,My client want to migrate DB/2 for AS/400 to Oracle 8i/9i. Is there

DB2 Migrate to Oracle 8i?!

This tip provided by Experts Exchange DB2 Migrate to Oracle 8i?!   This tip provided by Experts Exchange.   Question: Hi all,One of our client want to migrate their existing

Catching Events

If you are looking for a way to catch events every time a Swing text field changes, there is an easier way than listening for regular document events. It’s pretty

Using Inner Interfaces

Inner classes are frequently used to reduce project clutter and to reduce external exposure of classes with localized usefulness. Inner interfaces are defined in a similar fashion and while they

Returning Keywords From a Map

A Hashmap is often used to store Keyword-Value pairs. The keywords are strings, so it is convenient to return a list of the keywords as an array of Strings. Fortunately,

Slicing in C++

Here is an example: class Shape {public: Shape() { }; virtual void draw() {};};class Circle : public Shape {private: int m_iRadius;public: Circle(int iRadius){ m_iRadius = iRadius; } virtual void draw()

Defining Static Data Members

Static data members must be explicitly defined exclusively in one source file. Here’s an example of a header file, such as MyClass.h: class MyClass { public: static int x; //

Using the ++ Operator

The ++ operator can be used in prefix and postfix. When it is used as a preifx , its value is evaluated first, then the statement is executed. For example:

Do Not Use Global Variables With Recursion

Global variables should never be used with recursion. It leads to stack overflow and program crash. Recursion works well only if it is in a self contained unit, using local

Use the Correct Date Format in SQL Query

Frequently the date format is mistakenly used in a SQL query of MS ACCESS. For example, when you want to make a query get records from May 1, 2000 in

MP3 Tag Editor

A simple but effective MP3 Tag Editor written entirely in Visual Basic 6, and that consists of a DLL and a front-end application. What’s best is that you get the

Server-Side Caching in COM+ and VB

Is server-side caching good or bad? This question can create many heated discussions. Since I’m from Sweden, I like what we call the golden middle course. We even invented a

Generating Data with XSLT

t’s becoming common to retrieve data from a relational database formatted as a hierarchical XML document. By using an XML schema, it’s possible to generate data from XML documents and

Using CoInitialize()

CoInitialize() should be called for each thread in the application that makes COM calls. Not just once at application startup.

Option Explicit

Many developers code text boxes to only accept numeric values. They usually forget about keyboard and mouse copy and paste functions. The following code only allows values 1 to 9

The Paint Protocol

The AWT Component.paint and Component.update methods take a Graphics object as a parameter. This object should not be retained, because it might be a transient object valid only during the

Create a List of Months

The following code creates an array with month names or populates a combobox or listbox with same = without all the typing: holdMonth(1) =