Tip Bank

At times you may need to execute the same block of statements for different values of a variable, but you can’t use a straight For Next loop because the sequence

‘ Return True is a string is made only of spaces, tabs, and Null characters.’ This function is especially useful to test whether fixed-length strings ‘ are initialized.Function IsNullString(Text As

The single statement that is most useful to avoid bugs is Option Explicit. Always use it in every module of your applications. Even better, let the Visual Basic IDE automatically

By default, textbox controls work in insert mode, where each new character never overwrites existing ones. If you wish to implement overwrite mode you can take advantage of the fact

When you build your ActiveX controls and components, Visual Basic automatically creates all the GUIDs as necessary. The same also happens in other cases, without you even realizing it: for

Many VB programmers assume that Visual Basic 5.0 is not capable of creating stand-alone Type Libraries, because the documentation states that when an ActiveX component or control is created, the

Fixed-length strings are generally slower than conventional strings, because all VB string functions and operators only recognize conventional strings, thus all fixed-length strings must be transparently converted to and from

Private Declare Function GetUserName Lib “advapi32.dll” Alias “GetUserNameA” _ (ByVal lpBuffer As String, nSize As Long) As Long’ The name of the interactive userFunction UserName() As String Dim buffer As

Short-circuit evaluation is an optimization technique automatically adopted by most modern compilers, including all flavors of C++, Borland Delphi and many others. Unfortunately, the Visual Basic compiler is not in