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

Question: I’m trying to make a small image at the bottom of each form submit information from my database to the user when the user presses on it. However, I

Question: I use Exchange 5.5 and Outlook 2000. Some users are getting duplicate Internet e-mails. I can’t find out why. Recipients in Exchange have only one SMTP address and one

Question: In Netscape, next to the address bar is an arrow pointing down. If you click on that arrow, it displays the previous 14 addresses. How can I prevent it

If you want to prevent the user from closing a form by using Alt+F4 or by clicking on the “X” button in the upper-right corner you just need to write

Const MMSYSERR_NOERROR = 0Const MAXPNAMELEN = 32Const MIXER_LONG_NAME_CHARS = 64Const MIXER_SHORT_NAME_CHARS = 16Const MIXER_GETLINEINFOF_COMPONENTTYPE = &H3&Const MIXER_GETLINECONTROLSF_ONEBYTYPE = &H2&Const MIXER_SETCONTROLDETAILSF_VALUE = &H0&Const MIXERLINE_COMPONENTTYPE_DST_FIRST = &H0&Const MIXERLINE_COMPONENTTYPE_DST_SPEAKERS = &H4Const MIXERCONTROL_CONTROLTYPE_VOLUME =

Unlike regular LNK shortcut, which contain data in binary file, Internet shortcut files are just text files in this format: [InternetShortcut]URL=www.domain.com Thus it is simple to programmatically create an Internet

The Coolbar control consists of a collection of Band objects, and each Band object exposes a Child property. To move a control inside the Coolbar you just have to assign

There are two simple ways to add the so-called size-grips to the bottom-right corner of a form. The first method is to add a StatusBar control, which includes a size-grip

Private Declare Function mciSendString Lib “winmm” Alias “mciSendStringA” _ (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, _ ByVal uReturnLength As Long, ByVal hwndCallback As Long) As LongPrivate Declare Function