Question: I’d like to know if there’s any royaltyto be paid when I distribute the applications I did in PowerBuilder. Answer: No, you can distribute PB client applications royalty-free. You

Question: How can I use the CHOOSECOLOR WIN32 API with Powerbuilder? Answer: Create a custom user object and declare the following local structure:long lstructsizeulong hwndownerulong hinstancelong rgbresultblob lpcustcolorslong flagslong lcustdatalong

Question: I have a recurring problem inserting rows into tables that have a column that is “int IDENTITY PRIMARY KEY.” At some point in the life of the table, I

Question: I am trying to back up a database to a disk backup device over a network. When I attempt my backup, I encounter an error 5 ? Access denied.

Question: Is there any way I can use a single quote in a string and use that string as a value in a text field? Is there an escape character,

Question: I need to run DBCC checks on my databases every week, but I was advised not to use the databasewizards in MS SQL 6.5. Can DBCCs be setup to

A class member declared static is a single instance of that member shared by all instances of this class (that’s why it is sometimes termed a class variable, as opposed

Operator new allocates memory from the heap, on which an object is constructed. Standard C++ also supports placement new operator, which constructs an object on a pre-allocated buffer. This is

Choosing a short name for a namespace can eventually lead to a name clash. On the other hand, very long namespaces are not easy to use. For that purpose, namespace

Identifiers starting with __ (double underscore) are reserved for C/C++ implementations and standard libraries. Furthermore, C++ programs are transformed by the compiler (inline substitution, addition of this as an argument

Before implementing containers such list, vector, queue, stack etc., by yourself, you can cut costs and software shipment time significantly by using The Standard Template Library, or STL. STL defines

Most VB4 programmers know they can access a form’s control collection using a For Each loop. Many, however, are not aware that individual control arrays are actually collections. This knowledge

Often users print from applications that support a font the printer doesn’t. An error occurs if an application uses a statement such as Printer.Print SomethingToPrint following a Printer.FontName = FontName

Just about every VB developer uses the Move (Screen.Width – Width) 2, (Screen.Height – Height) 2 method to center the forms on screen. However, when the user has the Windows

When you want to set a flag to True or False, depending on the results of a comparison, you don’t need to use an If statement like this: If x

Question: I am trying to process a table and its rows and cells on an HTML page. I have given the Table, TR and TD elements IDs. I am trying

Question: I have Windows 95 OSR 2 installed (FAT32). Should I be able to install NT Workstation/Server as a dual boot option? Whenever I run setup.exe I get a message

According to the C++ standard, the following line is illegal: char *s = “hello world”; //illegal Though still supported by many compilers, it’s deprecated and should be avoided. The reason

In many frameworks and software projects, all classes are enforced to be descendants of one common generic class, usually named Object. This design policy prevails in other OO language such

A reference is always bound to the same object. When that object is destroyed, any use of its reference yields undefined behavior. The following example may demonstrate that: int &

If you don’t want users of your class to be able to assign objects of its type (password string objects are a good example), you can declare a private assignment

A class containing no data members and no member functions is an empty class. It’s defined like this: class PlaceHolder {}; What’s it good for? It can serve as a

For the two major browsers, the easiest way to invoke a JavaScript function is create a java.net.URL instance using the JavaScript: protocol handler. To invoke the JavaScript command, pass the

Unlike the Windows 95 common controls, the standard list box doesn’t have a horizontal scrollbar when list items are too wide to fit within the list box. Fortunately, it’s not

Setting an element in an array of option buttons to True is easy. Click on the option button, or use this code: OptionArray(ThisOne) = True ThisOne is the Index of

The Java core API includes a class called java.lang.System from which system dependent operations can be performed. One of the methods of the System class is getProperty(String) which will return

Use Private variables in BAS modules to protect data that the module’s routines must access, but which should be hidden from the rest of the application: Dim hidden_data As IntegerFunction

It can be troublesome to convert a text file into an Access database. It takes a lot of time to open the file for sequential access and create new records

Visual Basic gives you the option to turn off error trapping in your projects. This is useful when you suspect that your error handlers contain errors themselves. To turn off

To create a SCHEMA.INI file for a text file quickly and easily, let the ODBC setup and drivers do it for you. Go to the Control Panel and start ODBC.