The usual way to determine the Windows’ main directory is based on the GetWindowsDirectory API function, which requires that you set up a buffer for the result, and then extract

Sometimes you need to clear all the members of a struct after it was used. With large structs, you usually use memset() for that purpose. However, for smaller structs that

While most of the code optimizations are performed at compile time, there are optimizations that only a linker can perform. For example, it can detect unreferenced function calls. These are

In earlier stages of C++, it was impossible to delete a const object, even if that object was constructed on the free store. This could cause memory leaks. However, the

To initialize a struct that contains bit fields, simply use the ={0}partial initialization list: int main(){ struct MP3_HEADER { unsigned Sync:11; unsigned Version:2; unsigned Layer:2; unsigned Protection:1; unsigned Bitrate:4; unsigned

Question: Does Java have a switch statement that can use doubles and floats? Answer: The Java switch statement only supports values of type char, byte,short, or int. To conditionally execute

Most C++ users already know that they shouldn’t use auto_ptr objects as elements of STL containers. However, fewer users know exactly why this is so. The C++ Standard says that

I often hear people ask whether it’s possible to write code that is quicker than STL. This is a paradoxical question: the C++ Standard defines minimum performance requirements with which

Question: Often I place a Break Point in a Function or Procedure for Debugging purposes.How I can find the immediate calling procedure?Or, better how I can find all the previous

Question: I have a program in VB6 using an Access 97 database. The code I use for all my procedures is as follows: Dim db as DatabaseSet db = DBEngine.Workspaces(0).OpenDatabase(“biblio.mdb”,

Question: In C++, when a programmer intends to write: if (value == 1) { But, they often make the following mistake: if (value = 1) {…… Why doesn’t this problem

Question: When I try to implement the code that is in MSDN, I receive Run-time error ‘446’ Object doesn’t support named arguments. Dim cn As New ADODB.ConnectionDim rs As New

Question: I need to know how to pass a parameter from HTML to Standard EXE, and how to get these parameters in VB after you’ve passed them? Answer: Visual Basic

Question: After compiling my VB app, and installing it on my machine, it will run. But, when I install it on my professor’s machine at school, it doesn’t work at

Question: I just started with VB6 programming and I need to write a short program doing the following: 1. Enter a sentence.2. From this sentence which was entered, pick any

Question: I have noticed that a termination event won’t be fired unless the class variable is out of scope, or I specifically set the class variable to Nothing (in earlier

Question: Would you please tell me the code in Visual Basic for a cube root function on a basic calculator. Answer: It’s very simple, you just have to raise a

Question: I created a program to help our sales department to keep track of their sale quotes. It uses a MDB database and I used the ADO components to gather

Question: When opening an ADO connection, how do I specify that it use the SQL Server OLEDB provider with a DSN? Answer: Here’s the connection string you should use. Be

Question: How would I get a different picture to pop up every 3 seconds in a different position? Answer: It’s pretty simple, actually: Make a form with an image/picturebox control

Question: I have an Access 97 database with an OLE Type field containing bitmaps loaded with the LoadPicture() function. This works fine and the images turn up as “Bitmap Image”

Question: I am an extreme newbie with VB. How do I change the caption of a label to the value of a textbox? Answer: Substitute the name of the Label

Question: I have been using Visual Basic to manipulate databases for some time now and I consider myself skilled at it. The next challenge presented is to establish a connection

Question: When a control has focus, is there some way to determine which control had focus just before it? Answer: Nope, there isn’t any way to do that. But, I

Question: After I compile my DLL in VB and run the component through IIS, I cannot recompile the DLL and I get a file locking error. I am using VB6

Question: I get the folling error message when I try to run my code: Compile Error: Procedure declaration does not match description of event or procedure having the same name.

Question: I have a listbox with some names loaded from a recordset, I have also associated the memberID with its associated name as in the following: lstMember.ItemData(lstMember.NewIndex)= rsMembers![MemberId]. I want

Question: Is there any way I can make a JFrame look like JInternalFrame? It looks bad at runtime when you change the look-and-feel, but the mainframe doesn’t change. Answer: This

Question: Is it possible to have an array of character arrays? What about anarray of multidimensional character arrays? Answer: Java arrays are first-class objects. They can be referenced byObject reference

Question: I am trying to get remote access to my e-mail account. Although I can dial in the domain successfully, when I start Outlook, I receive this error message: “Network