The ConfigurePort API function lets you programmatically bring up the system dialog box for configuring a COM or LPT port. The function returns a non-zero value if successful (that is,
One of the simplest and most effective uses of the ObjPtr function is to provide a key for quickly locating an object in a Collection. Let’s suppose you have a
You can retrieve and change the blink rate of the flashing caret inside TextBox controls through a couple of simple API functions: Private Declare Function SetCaretBlinkTime Lib “user32” (ByVal wMSeconds
The Open statement also supports special device names such as COM1 or LPT2. You can build on this feature and use the Open command to test whether a given serial
Creating a read-only property or a write-only property isn’t difficult, as you probably know: just omit the Property Let (or Set, if dealing with objects) or the Property Get procedure,
You can use the Navigator object to retrieve information about the browser that is executing your code. Using this object, you can decide to execute different code for different browsers.
The Active Server Pages Session object provides a quick way to password-protect your pages and force users to log in. The trick is to set a Session variable once the
Some users have spent frustrating hours trying to add a data connection to a Visual InterDev 6 project but only get the error, “No such interface supported.” This is often
Many of the C Runtime Library functions are in fact macros in disguise. < stdlib.h> routines, memset(), strcpy() and others are often implemented as macros that perform some low-level system