The traditional convention of sending an integer as an error flag is problematic and unsatisfactory in OOP. The C++ exception handling mechanism can offer much more flexibility, safety and robustness.

The standard string class offers two ways to access a single character from a string object. The first one is to use the overloaded subscript operator [ ] like in

Whenever you overload operators such as + or -, it is useful to support the corresponding += and -= as well. As opposed to a common belief, the compiler will

There’s only one thing worse than a non documented source file: a misleadingly documented source file. A detailed description of a member function which no longer exists, or a documentation

If you’re still using the almost deprecated malloc(), free() and realloc() just because you need a dynamic memory container which expands and shrinks upon request, you should seriously consider using

Question: What is the best browser-based way to read values from the Registry? Can JavaScript do it? Answer: There is no easy way to read the Registry on a user’s

Question: Is there a way for me to check if a file exists before writing to the file using Java? Answer: You can determine if a file exists by calling

Question: Does java have dynamic_cast? If so, how is itused? Answer: All class casts of nonprimitive types in Java are dynamic and performed at runtime.In C++ the dynamic_cast operator will

Question: I need help to calculate the number of days between two dates. This may seem like a trivial question, but for the life of me, I cannot find away

Question: How do I go about using exponents in Java? For example, how would I do 6 to the power of 3? Answer: You want to look at the documentation

Question: I’m having trouble reshaping a frame to the size of a loaded image. I start out by saying: int fx = image.getWidth(this); int fy = image.getHeight(this);then I try to

Question: We have installed Powerbuilder 6.0.0. and have migrated applications. The application is working OK, but I am having a problem with the debugger. When I put a “break point”

Question: I have tried using the “shell” statement in VBA to load and run an existing .exe file. The file seems to load but does not run. (I have used

Question: We would like to find out if a directory that was typed exists. Furthermore, we prefer not to use a list box control or getFileOpenName. Answer: To do this

Question: I’m using PB6.0 with Sybase SQL Anywhere 5.0. I would like to be able to record the date and time in my table(s) whenever a user updates or adds

Question: How do you get the position of the mouse pointer (x- and y-cordinates) in a script? Answer: Use the PointerX() and PointerY() functions. Related Posts Scaling Your Project with

Question: I am attempting to add a picture of a form to a Word file. How can I do this? Answer: The simplest method, most often overlooked, is to run

Question: How can I make a program that controls other programs? For example, I’ve seen programs that can change the text in a text box of another program. Answer: Sounds

Question: Using PFC, when I select a row, it turns dark blue, often obscuring the data. Is there a way to change the color to something lighter? Answer: The way

Question: How can I find the Active Time Zone offset from UTC that the computer clock is set to? This value changes when going from Standard to Daylight Savings Time.

Question: How do you convert a long integer to two integer values (that is, get the low word and high word contained in a long integer)?Danial Appleman’s API Guide discusses

Question: Is it possible to use API to determine the OS of a system without resorting to SysInfo control? Answer: Sure. Just call the GetVersionEx API. Add the following to

Question: Given: Dim oX as Object Set oX = optChoice1 If TypeOf oX is CheckBox Then… If optChoice1 is a CheckBox the If… will be true unless optChoice1 is an

Question: I made a project that resides in a subdirectory under Microsoft Visual Basic 4. Example: C:/Program Files/Microsoft Visual Basic// When I run the program, I want it to get

Question: I inserted a new row in a table with Identity column, and saved it by calling update function. Then I immediatly tried to modify this record and update again.

Question: How can I make a PB application as a service on Windows NT? I have an application that has no interaction with users, and I want to run it