Many Windows programs use two adjacent list box controls to let the user select a number of items from a list of available values; such list boxes are mutually exclusive,

In all standard controls, Up and Down arrow keys move the focus on the previous or next control in the TabIndex order, respectively. This contrasts with text boxes, where these

Option ExplicitPrivate Declare Function CreateFile Lib “kernel32” Alias “CreateFileA” (ByVal _ lpFileName As String, ByVal dwDesiredAccess As Long, _ ByVal dwShareMode As Long, lpSecurityAttributes As Any, _ ByVal dwCreationDisposition As

Many code wizards and automated source code generators synthesize the following main() template, even if the application doesn’t use command line arguments: int main(int argc, char* argv[]){ return 0;} This

The constructors in a class hierarchy execute in the following sequence: base class constructors are called first, then member object’s constructors, and finally, the constructor of the derived class executes.

Although the advantages of disabling further derivation of a class are often doubtable, C++ allows you to do that by declaring a class’s constructor and other special member functions private.

‘auto’ is undoubtedly the least used C++ keyword. This is because it’s always redundant. auto indicates local automatic storage type, for example: int main(){ auto int x; auto char s[10];}

The precise location of the vptr (the pointer to the class’s table of virtual functions’ addresses) is implementation-dependent. Some compilers, e.g., Visual C++ and C++ Builder, place it offset 0,

Virtual inheritance imposes several restrictions. One of them is that you cannot use a class that has no default constructor as a virtual base class. Consider the following program: struct

Normally, a list of items in a Java application is presented in a JList or JComboBox. If all of the listed items are created equally, the list handles them quite

Here is an example of how to make your application auto start from the registry.The code also shows how to query and clear this. ‘Module: Module1 Option Explicit Private Const

Clicking a submit button on a Web form can create havoc. Here is an easy way to restrict a Web user from clicking the submit button more than once. Once

Most ASP books and articles state that you need to set the Respose.Expires property to 0 or -1 to prevent the end user’s browser from caching an ASP page. However,

‘ a variation of the Split function that works with more than one separators’ note that separators can consists of 2 or more chars’ Example:’ Dim res() As String’ res()

‘ generate a random string” the mask can contain the following special chars’ ? : any ASCII character (1-127)’ # : a digit’ A : an alphabetic char’ N :

‘ Concatenate a variable number of text files into a single result file” Params:’ – ResultFile: the complete path of the result file you want to create’ – Separator: a

Private Declare Function IsCharUpper Lib “user32” Alias “IsCharUpperA” (ByVal _ cChar As Byte) As Boolean’ Check is the specified string is composed only by upper case characters (no ‘ digits

Private Declare Function IsCharLower Lib “user32” Alias “IsCharLowerA” (ByVal _ cChar As Byte) As Boolean’ Check is the specified string is composed only by lower case characters (no ‘ digits

When you use the Add-Ins project template to build your own add-ins, the description of the add-in appearing in the Add-Ins Manager window is always “My Addin.” It isn’t immediately

A pointer to member of a base class can be converted to a pointer to a corresponding member of its derived class. The opposite, however, is illegal: you cannot convert

The std::string has a data member that holds its size. Calculating the size of a string object is therefore a fast constant time operation, which is independent of the number

You can make your code more readable by always adding a remark on top of all your procedures. Create an add-in that makes it fast and easy. First, run New