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

An ActiveX DLL doesn’t have direct access to the environment of the calling EXE. For example, the App and Printer objects in the DLL don’t correspond to the objects with

‘ The shortest item in an array of any type’ (it applies the LEN function to all the items in the array’ and then takes the highest value)” FIRST and

‘ Return the maximum value in an array of any type” FIRST and LAST indicate which portion of the array’ should be considered; they default to the first’ and last

‘ The longest item in an array of any type’ (it applies the LEN function to all the items in the array’ and then takes the highest value)” FIRST and

Here’s a simple method to programmatically insert an image into a RichTextBox control, by copying it into the clipboard and then pasting it into the control: Private Declare Function SendMessage

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

Even the latest versions of Oracle

When you are unsure if you need to instantiate an object from your ASP pages, as in the case of instantiating a COM object to access SQL Server, it is

If you need to execute a stored procedure from a Command object, and the stored procedure will not return any rows, you can boost performance of the Command object by

When referencing recordset values in your ASP code, don’t use the commonly used

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