If you do, then all the pages will fight for the use of this connection. In addition, don’t cache an ADO connection in the Session object. If you do, a

You can use the keywords class and struct in forward declarations interchangeably. For example: class X; // fwd declaration uses ‘class’X *p;struct X // definition uses ‘struct'{};void f(){ p=new X;}

Many symbolic debuggers limit the length of symbols they can display. For example, the Visual C++ debugger can display strings that contain up to 255 characters. Suppose you have a

Suppose you need to define a function that takes a vector object and performs certain operations on it. The function has to be generic, that is, it should handle all

Sometimes you need to make sure that only one instance of the same application can run at any given time. Although every platform defines different locking schemes, you can use

One of the issues that have been discussed at the C++ standards committee is whether the declaration of static member functions is permitted. For example: struct A{ extern Related Posts

The remove_if() algorithms (defined in the standard header ) has the following prototype: template ForwardIterator remove (ForwardIterator first, ForwardIterator last, Predicate pred); The first two arguments mark the sequence’s beginning

The Standard Library defines the std::remove() algorithm, which moves desired elements to the front of a container and returns an iterator pointing to the end of the sequence of the

The ComboBox control exposes the DropDown event, that lets you determine when its list area is being opened. However, VB doesn’t offer any simple way to understand when the list

‘ ensure that a listbox item is visible’ if the second argument is omitted, the index of current item is used” NOTE: uses the ListBoxVisibleItems functionSub ListBoxEnsureVisible(lst As ListBox, Optional

In general you don’t have any control on a ComboBox’s Height property, because it is determined automatically by VB depending on the font used for the ComboBox control. If you

Private Type RECT Left As Long Top As Long Right As Long Bottom As LongEnd TypePrivate Declare Function GetWindowRect Lib “user32” (ByVal hWnd As Long, _ lpRect As RECT) As

By default, VB ListBox controls don’t display an horizontal scrollbar, so if the items you add to the controls are wider than the control’s Width, the end user isn’t able

Private Declare Function SendMessage Lib “user32” Alias “SendMessageA” (ByVal _ hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _ lParam As Any) As LongPrivate Declare Sub CopyMemory

The modulus operator can only be applied to integral types. To compute the remainder of two floating point variables, you have to use the fmod() function instead. Fmod() is declared

Private Declare Function SendMessage Lib “user32” Alias “SendMessageA” (ByVal _ hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _ lParam As Any) As LongConst LB_FINDSTRING = &H18FConst

Private Declare Function GetMenu Lib “user32” (ByVal hWnd As Long) As LongPrivate Declare Function GetSubMenu Lib “user32” (ByVal hMenu As Long, _ ByVal nPos As Long) As LongPrivate Declare Function

Private Declare Function GetWindowLong Lib “user32” Alias “GetWindowLongA” _ (ByVal hWnd As Long, ByVal nIndex As Long) As LongConst GWL_STYLE = (-16)Const WS_DISABLED = &H8000000′ Return True if the form

You can easily create columns of data in a ListBox control by setting its tab stop at appropriate positions. This way, you can use a ListBox control as a sort

Often OptionButton controls are arranged in control arrays. To quickly find the index of the only selected OptionButton control you can use the following code: ‘ assumes that the control

‘ Tile a bitmap to a form or a Bitmap box” Target can be a Form or a BitmapBox control’ Bitmap can be the Bitmap property of a PictureBox or

When developing Access 97 applications using VBA, you may have problems porting your application to other computers. Run time errors can occur from basic VBA commands, especially when rolling out

Using Swing, you can set the color of each node in Jtree. This is done by customizing your own TreeCellRenderer (overriding the DefaultTreeCellRenderer class), then calling the setBackgroundSelectionColor() method of

Question: Is there any way to test if a socket is still open without writing to it? Answer: Despite being relatively easy to use, the Socket class is not implemented

Question: In the first servlet we set the value for HTTP header as below: response.setHeader(“SessionKey”,”SessionValue”); In the next servlet we tried retrieving the above set header value as: request.getHeader(“SessionKey”); We