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April 16, 1999

Make the Ants March

To implement a quick and easy version of the old “marching ants” line around a control, place two CommandButtons, a Shape, and a Timer control on a form. Then insert

Using an Associative Array

An associative array (also called map or dictionary) is an array for which the index does not have to be an integer. An associative array stores pairs of values. One

Implement a ListView ItemDoubleClick Event

Double-clicking an icon or file name in Explorer is the standard way of launching an application in Windows. However, if you’re developing an app that uses the ListView control from

Ensure Foolproof Data Entry Times

Asking users to enter time values can often lead to problems formatting what the user enters. I use this piece of code to create a drop-down list of hours, minutes,

Use Custom Form Properties

You can easily find out whether your user clicked on OK or on Cancel on a modal dialog. This example also prevents the user from unloading the form, and thereby

Keep Your Clustered Index’s Weight Down

In SQL Server 7, a significant change was made to the way nonclustered indexes work when a clustered index exists on a table. In version 6.5, the nonclustered index used

Prevent Browsers From Caching ASP Pages

Whenever you are programming in Active Server Pages, make sure that your browser is set to check for a new page every time. Otherwise, you may not see your latest

Stream Unique Identifiers

While attempting to deserialize (or unmarshal) a serialized object instance, you may generate an exception with a message similar to: java.rmi.UnmarshalException: Error unmarshaling return; nested exception is: java.io.InvalidClassException: RMIParm; Local