You will often need to verify the correct running of your code. While you can use the debug mode of an IDE or compiler, you can also include some debugging
Most of us have the tendency to write: String s1 = “Hello”;String s2 = “World”;String s3 = s1 + s2; However, the above is an expensive operation. As Strings are
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It would often be convenient to store multiple values in the Tag property. Here are two simple functions that help you do that. The first function stores the value in
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Only in VB6 do the common controls OCX files provide an option to select a full line in a listview. In earlier versions, you can select a ListItem only by
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After trapping an error in debug mode with the usual “On Error Goto ErrorHandlingCode”, you might be frustrated that you can Related Posts What Are Effective Methods for Handling Large
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With VB6 came the ability to return arrays from functions. Returning an uninitialized array is a problem because there is no easy way?other than error-trapping?to find whether an array has
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If you ever wondered how some DOS applications, such as Norton Utilities, calculate the estimated finishing time for a long process, here Related Posts CES 2024: Tech Innovations and Smart
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The fast way to get multiple selected items from a ListBox control is to send it a LB_GETSELITEMS window message. Here Related Posts How To Clear Cookies On AndroidCloud Security
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As the user types into a drop-down combo box, he or she passes keystrokes to the ComboIncrementalSearch routine, which then searches the combo box Related Posts The Role of Breach
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The VB Integrated Development Environment (IDE) contains many toolbars and menu functions, and the functions you normally use are usually on different toolbars and menus, so most programmers have several
To optimize the If construct, separating testing conditions (“And” operator or “Or” operator) in different expressions can improve the performance. For example, don Related Posts Using the DATALENGTH SQL FunctionThe
To read a binary value from an input file stream (ifstream) object, use the read() member function. read() takes two parameters: char * and long, which hold the address of
It’s a good idea to parenthesize every macro argument. For example: #define MAX(x,y) (x)>(y)?(x):(y) The parentheses ensure that the macro is evaluated correctly, even if the user passes complex expressions
A polymorphic object has one or more virtual functions. When you serialize such an object to a file so that it can be reconstituted later, the deserialization might rewrite its
To write the binary value of a variable to an output file stream (ofstream) object, use the write() member function. write() takes two parameters: const char * and long, which
racle databases provide a powerful mechanism for enforcing business rules, called referential integrity (RI), which is implemented either via a declaration of foreign key (FK) constraints (“declarative RI”) or via
esigning a managed security solution (MSS) for your Web servers will cost you, but it doesn’t have to be money. Time and diligence are the only things you need to
‘ A class that creates UDL files for use as ADO Data Sources.’ Universal Data link files are handy for select data sources but there’ are lack of a way
To create a drop-down control with a list of used or unused drive letters, place two ComboBox controls on a form, named Combo1 and Combo2, and include this code to
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