http://funcode.org free online programming resource on dotnet, csharp, web related topics Tue, 02 Sep 2008 15:58:36 +0000 http://backend.userland.com/rss092 en Visual Basic specifies a Boolean’s default values as zero for False and -1 for True. You may save and set the value of a check box, based on the absolute value of a Boolean variable, as these correspond to the intrinsic constants vbUnchecked and vbChecked: Dim bBool as Boolean bBool = True '//If ... http://funcode.org/article/visual-basic/use-boolean-variables-for-checkbox-values.aspx Unlike the Windows 95 common controls, the standard list box doesn’t have a horizontal scrollbar when list items are too wide to fit within the list box. Fortunately, it’s not hard to direct a listbox control to display a horizontal scrollbar. Add this code to a form’s Load event. It ... http://funcode.org/article/visual-basic/display-horizontal-scrollbar-in-listbox.aspx Setting an element in an array of option buttons to True is easy. Click on the option button, or use this code: OptionArray(ThisOne) = True ThisOne is the Index of the member you want to be selected. Getting the True member of an option array is not so simple. Because you need ... http://funcode.org/article/visual-basic/get-the-true-member-of-an-option-array.aspx When attempting to determine which option buttons a user has selected from an array of option buttons, use this code instead of using an inefficient If-Then construct: intSelectedItem = Option(0).Value * O - _ Option(1).Value*1 - Option(2).Value * 2 If you have more than a few items, put this ... http://funcode.org/article/visual-basic/determine-which-option-buttons-have-been-selected.aspx I am already has a digital camera, and now I am looking for digital photo frame. Well, I think many people have known this frame or maybe you already has one at your home. I like this frame because it’s more convenient and it looks beautiful at my home and ... http://funcode.org/article/news/the-stylish-digital-photo-frame.aspx For threads that are manually created via the Thread class, you can call the Join method to wait for a thread to finish. This works well when you need to wait for all threads to finish processing before an application terminates. Unfortunately, the thread pool threads do not have a ... http://funcode.org/article/csharp/waiting-for-all-threads-in-thethread-pool-to-finish.aspx Synchronizing the Reading and Writing of a Resource Efficiently When you have a resource that is shared by multiple threads, you need to provide exclusive access to this resource when a thread is writing to it. However, you do not want the overhead of providing exclusive access to this resource when ... http://funcode.org/article/csharp/synchronizing-the-reading-and-writing-of-a-resource-efficiently.aspx The ThreadPool is a great way to perform background tasks without having to manage all aspects of the thread yourself. It can be handy to know when the ThreadPool itself is going to become a bottleneck to your application, and the GetAvailableThreads method can help you. However, you might want ... http://funcode.org/article/csharp/determining-whether-a-request-for-a-pooled-thread-will-be-queued.aspx When using a System.Threading.Timers.Timer class, here are a few scenarios you may encounter: You want to use a timer to call a timer callback method at a fixed time after the timer object has been created. Once this callback method has been called the first time, you want to call this ... http://funcode.org/article/csharp/configuring-a-timer.aspx Encrypting the string will prevent users from being able to read and decipher the information. If you have a string you want to be able to encrypt and decrypt — perhaps a password or software key — which will be stored in some form accessible by users, such as in ... http://funcode.org/article/csharp/encryptingdecrypting-a-string.aspx