This is one of the simplest, but most powerful, ways to make a form scrollable. This method automatically disables or enables scrollbars according to the size of the area in

Many programmers use Visual Basic’s Clipboard object to perform Cutting, Copying, Pasting and Undoing code. For example, to copy some text from a textbox, programmers sometimes use the following code:

Sometimes there is a need to group records into two larger categories, regardless of all other groupings. Using the Northwind database for an example, let

‘——————————————————-‘ The CTREEVIEWEDIT Class module” This class lets you use a regular TextBox control to’ edit a treeview node’s label. All you have to do to’ use this class is

Often, properties and methods associated with grid controls don’t provide an absolute (relative to the actual first row and not the first displayed row) row index of current or selected

By using resource file, strings used by controls or message windows can be converted to different language strings in your application. The VB 6 Resource Editor allows the addition of

During the preprocessing phase, you can report errors by using the #error preprocessor directive. For example, suppose you have a program that uses 64-bit integers. This program has to be

Although the library was deprecated for several years, many C++ users still use it in new code instead of using the newer, standard compliant library. What are the differences between

To generate random floating numbers, choose a floating point number, divide it by the largest value of int type and multiply the result by the value of a function that

C++ requires that the size of an array be a constant integral expression. However, the following code refuses to compile: // in const.hextern const int ID_LENGTH; // declaration// in const.cppconst

You can override the default number of digits after the decimal point by calling the precision() member function of an ostream object. The following program first displays six digits after

To create an iterator of a vector, you have to use a vector specialization. In the following examples, I create two vector iterators: one for the specialization vector and another

By default, cout displays integral values as decimal numbers. You can override this setting and have integral values displayed in hexadecimal and octal notations by using the ‘hex’ and ‘oct’

In C++, pointers are strongly-typed. Therefore, you can’t assign a void pointer to any other pointer type without casting it explicitly: int n;void *p = &n;int *pi=static_cast< int* >(p);//C++ requires

C++ guarantees that operator delete checks its argument for null-ness. If the argument is 0, the delete expression has no effect. In other words, deleting a null pointer is a

By default, iostream objects are set to display floating point values in fixed notation. To change this, you apply the ‘scientific’ manipulator to an output stream object: #include using namespace

You can determine the line where the caret is in a multiline TextBox control by sending the control a EM_LINEFROMCHAR message, as follows: Private Declare Function SendMessage Lib “user32” Alias

You can’t clear the contents of a MaskEdBox control by setting the Text property to a null string if the MaskEdBox’s Mask property contains delimiter. In fact, you must include

At times you may want to temporarily hide the mouse cursor, for example in order to reduce flickering. To do so you just need the ShowCursor API function: Private Declare

If a form contains one CommandButton control whose Default property is set to True, the Enter key activates the CommandButton. If the form doesn’t contain any default CommandButton control, however,

Visual Basic doesn’t let you change the Style property of a CheckBox or an OptionButton control at runtime. However, you can easily do it by manipulating the control’s style bit,

When you disable a control, VB grays its contents. However, often this action goes unnoticed by the end users. Here’s a routine that changes the control’s BackColor property in addition