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any of the more common questions asked of the VB Pro involve formatting and validating data. In this 10-Minute Solution, you’ll learn how to validate and format a phone number.
ava continues to make inroads at all levels of computing. Mostrecently, Java has returned to its roots and found a home in the smalldevices for which it was originally designed.
untime errors can occur as a result of attempts to complete an invalid operation while the program is running. There are two causes of runtime errors: either one of the
You should be very careful while establishing database connections from your Web-based application. MDAC 2.0 (Microsoft Data Access Components) provides automatic connection pooling behind the scenes. Connection pooling in OLE
You should always mark your VB server components for
With MDAC 2.1 (Microsoft Data Access Components), you can generate a XML file quickly from a Recordset object. The Save() method of Recordset object takes in an optional parameter, adPersistXML,
Question: I’m running Outlook 2000 and would like to import my *.pst file into my home system. However, I receive an error message saying that the file needs to be
s Visual Basic and VBScript have progressed from version to version, chances are you have not kept up to date with some of the new functions introduced in the later
Browsers Targeted: Internet Explorer 3+ Depending upon your bandwidth availability, you can incorporate AVIs into your Web pages as navigational elements. If you set the dynsrc property of the tag
Elsewhere in the TipBank we show how you can display a custom popup menu on a TextBox control by subclassing the WM_CONTEXTMENU message that Windows sends the control when the
The TextBox control supports the capability to undo changes, but there is no property or method that exposes this feature. You can achieve the same goal with a a set
You can quickly determine how many lines of text are contained in a multiline TextBox control whose Scrollbars property is set to 3-Both – that is, when the TextBox behaves
To determine the index of the first visible line in a multiline TextBox control you only need to send it the EM_GETFIRSTVISIBLELINE message: Private Declare Function SendMessage Lib “user32” Alias
If your video display has 256 colors or less and you assign a dithered color to the BackColor property of a TextBox control, you’ll find that the background color under
By default, DreamWeaver 2 assumes that your page will be downloaded with a 28.8 KB per second modem. The estimated download time appears in the status bar. If you are
Java lets you cast an integer into a byte and vice versa. While this provides power and flexibility, we should be aware that Java’s byte data type is signed, meaning
We can use java.text.DateFormat to validate dates. DateFormat is an abstract class for date/time formatting subclasses. It provides parsing methods for conversion of text into date. If the conversion cannot
If we have a comma delimited string like “token0,token1,token2,,token4” that has some token(s) missing, and we try to use java.util.StringTokenizer to place each delimited token in a slot of an
For most uses, double is the default floating-point data type to be used. Variables of type double offer higher accuracy and minimize truncation and deviation to a minimum. This is
Java’s serialization provides an elegant, and easy to use mechanism for making an object’s state persistent. While controlling object serialization, we might have a particular object data member that we
A memory leak occurs when an application fails for some reason to release dynamic memory that was allocated using new or malloc().The application won’t reclaim the allocated memory because both
A standard in our shop is to provide keyboard shortcutswherever possible. We make extensive use of JOptionPaneobjects in dialogs for quick clarification and/or messages,but the buttons for “Yes”, “No”, “Ok”,
The compiler inserts temporary objects “behind your back” in several contexts. For time critical applications, the overhead of a temporary can be quite significant because both the constructor and the
When designing an exception class, think of it as a standalone class with data members and member functions. A well-designed exception class should have a member function that returns a
In general, the global new and delete operators are implemented in a thread-safe manner: each invocation of either operator locks the heap before performing the allocation/deallocation of memory and when
Browsers Targeted: Internet Explorer 5 Normally, if you don’t explicitly set a CSS property in a style sheet or style attribute, querying the style for that property will return an
Browsers Targeted: Internet Explorer 5 You can launch the Organize Favorites dialog box from code in Internet Explorer 5.0, through the window.external.ShowBrowserUI method. This method takes two arguments: the name
One of the complaints about HTML editors is that they try to help you too much and end up rewriting HTML code. On the other hand, if your HTML source
Browsers Targeted: Internet Explorer 5 In Internet Explorer 5.0, you can determine the characteristics of the specific system through the use of the built-in Client Capabilities behavior (known as clientCaps).
Question: The company I work for is nearly ready for e-business. We have developed lots of reusable business objects and I need to convert them into a format reusable/implementable in
