This form is used to demonstrate that the 'Focus U-Turn' techniques used in the first form work when the form is loaded, unloaded, and subsequently reloaded. It is also a convenient place to display a copyright notice and advertise my new book.
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I Focus U-Turn Test Program, Copyright (c) 1992, ETN Corporation
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Controlling focus is very important in both Windows and Visual Basic application design and programming. Understanding event processing and, more importantly, which particular events to use is another key skill. As you examine this little Visual
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Basic application, please note that it is both very simple and considerably complex. It is complex not so much because of the number of lines of code but because of the way in which it controls what happens on its forms. There are, perhaps, many
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ways in which to add Category 2 (i.e., 'verify on exit') edits to your VB forms. The technique for performing 'Focus U-Turns' presented herein is analagous to the technique used in Windows SDK/C/C++ edit control subclassing. If you find this
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interesting and want to learn more about focus, events, smart objects, Windows, and Visual Basic application designing and programming, then the following book will prove useful.
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