ActiveX components written in VB can contain both SingleUse and MultiUse classes at the same time. It usually isn’t a good idea to use both types of classes in the
Many developers incorrectly assume that a printer is always installed on their customers’ machines, and therefore omit to check that this is actually the case. The following function, deceiptively trivial,
It is very simple to retrieve the correct currency symbol, using just plain VBA statements: currSymbol = Trim$(Replace(FormatCurrency(0,0), “0”, “”)) If you can also determine if the symbol precedes or
The Procedure Attributes dialog includes a Procedure ID combo box, that lets you associate a particular ID to a given member of the class. You usually use this combo to
One of Internet Explorer 5.0’s new features is AutoComplete. If turned on by the user (it’s off by default) it helps users fill in the frequently used fields–like username, first
Swing’s JComboBox can be used to present a drop-down list, perhaps of status reports from a process, requiring minimal screen space until the user wishes to see the details. But
When architecting a client-server or n-tier application, you should decide on a particular locking technique and accordingly the transaction isolation level and concurrency control strategy for database transactions. This decision
The words argument and parameter are often used interchangeably in the literature, although the C++ Standard makes a clear distinction between the two. An argument is one of the following:
If you turn the mouse pointer into an hourglass (and back to normal) in a routine with error handling, don’t forget to turn the mouse pointer back to normal in